diff --git a/etc/agent.lgtm.conf b/etc/agent.lgtm.conf
index 5becab74b..a15b40504 100644
--- a/etc/agent.lgtm.conf
+++ b/etc/agent.lgtm.conf
@@ -18,12 +18,12 @@ input {
 output {
   amqp {
     host => "127.0.0.1"
-    type => "queue"
+    exchange_type => "queue"
     name => "rawlogs"
   }
   amqp {
     host => "127.0.0.1"
-    type => "topic"
+    exchange_type => "topic"
     name => "logsniff"
   }
   stdout { }
diff --git a/lib/logstash/config/mixin.rb b/lib/logstash/config/mixin.rb
index 131a9bed4..823df9947 100644
--- a/lib/logstash/config/mixin.rb
+++ b/lib/logstash/config/mixin.rb
@@ -109,10 +109,14 @@ module LogStash::Config::Mixin
         @config.find do |config_key, config_val|
           if (config_key.is_a?(Regexp) && key =~ config_key) \
              || (config_key.is_a?(String) && key == config_key)
-            success, message = validate_value(value, config_val)
-            if !success
-              @logger.error("Failed #{@plugin_name}/#{key}: #{message}")
+            success, result = validate_value(value, config_val)
+            if success
+              params[key] = result
+            else
+              @logger.error("Failed #{@plugin_name}/#{key}: #{result}")
             end
+
+            p "Result: #{key} #{result.inspect} / #{success}"
             is_valid &&= success
           end
         end # config.each
@@ -121,18 +125,69 @@ module LogStash::Config::Mixin
       return is_valid
     end # def validate_check_parameter_values
 
+    def validator_find(key)
+      @config.each do |config_key, config_val|
+        if (config_key.is_a?(Regexp) && key =~ config_key) \
+           || (config_key.is_a?(String) && key == config_key)
+          return config_val
+        end
+      end # @config.each
+      return nil
+    end
+
     def validate_value(value, validator)
       # Validator comes from the 'config' pieces of plugins.
       # They look like this
       #   config :mykey => lambda do |value| ... end
       # (see LogStash::Inputs::File for example)
+      result = nil
+
       if validator.nil?
         return true
       elsif validator.is_a?(Proc)
         return validator.call(value)
+      elsif validator.is_a?(Array)
+        if value.size > 1
+          return false, "Expected one of #{validator.inspect}, got #{value.inspect}"
+        end
+
+        if !validator.include?(value.first)
+          return false, "Expected one of #{validator.inspect}, got #{value.inspect}"
+        end
+        result = value.first
+      elsif validator.is_a?(Symbol)
+        # TODO(sissel): Factor this out into a coersion method?
+        case validator
+          when :string
+            if value.size > 1 # only one value wanted
+              return false, "Expected string, got #{value.inspect}"
+            end
+            result = value.first
+          when :number
+            if value.size > 1 # only one value wanted
+              return false, "Expected number, got #{value.inspect}"
+            end
+            if value != value.to_i.to_s # Try convert to number
+              return false, "Expected number, got #{value.inspect}"
+            end
+            result = value.first.to_i
+          when :boolean
+            if value.size > 1 # only one value wanted
+              return false, "Expected boolean, got #{value.inspect}"
+            end
+
+            if value.first !~ /^(true|false)$/
+              return false, "Expected boolean 'true' or 'false', got #{value.inspect}"
+            end
+
+            result = (value == "true")
+        end # case validator
       else
         return false, "Unknown validator #{validator.class}"
       end
+
+      # Return the validator for later use, like with type coercion.
+      return true, result
     end # def validate_value
   end # module LogStash::Config::DSL
 end # module LogStash::Config
diff --git a/lib/logstash/filters/base.rb b/lib/logstash/filters/base.rb
index 9ab1c3864..191cae8a6 100644
--- a/lib/logstash/filters/base.rb
+++ b/lib/logstash/filters/base.rb
@@ -8,11 +8,15 @@ class LogStash::Filters::Base
   attr_accessor :logger
 
   config_name "filter"
+  config :type => :string
 
   public
-  def initialize(config = {})
+  def initialize(params)
     @logger = LogStash::Logger.new(STDERR)
-    @config = config
+    if !self.class.validate(params)
+      @logger.error "Config validation failed."
+      exit 1
+    end
   end # def initialize
 
   public
diff --git a/lib/logstash/filters/grok.rb b/lib/logstash/filters/grok.rb
index 9117c2fb7..080e9639b 100644
--- a/lib/logstash/filters/grok.rb
+++ b/lib/logstash/filters/grok.rb
@@ -7,8 +7,8 @@ require "grok" # rubygem 'jls-grok'
 class LogStash::Filters::Grok < LogStash::Filters::Base
 
   config_name "grok"
-  config :pattern => :string
-  config :patterns_dir => :path
+  config :pattern => :array
+  config :patterns_dir => :array
   config :drop_if_match => :boolean  # googlecode/issue/26
          
   public
diff --git a/lib/logstash/inputs/amqp.rb b/lib/logstash/inputs/amqp.rb
index 6b7acdb0f..0437aad3c 100644
--- a/lib/logstash/inputs/amqp.rb
+++ b/lib/logstash/inputs/amqp.rb
@@ -4,15 +4,25 @@ require "logstash/namespace"
 require "mq" # rubygem 'amqp'
 require "uuidtools" # rubygem 'uuidtools'
 require "cgi"
+require "uri"
 
 class LogStash::Inputs::Amqp < LogStash::Inputs::Base
   MQTYPES = [ "fanout", "queue", "topic" ]
 
   config_name "amqp"
-  config "pantscon" => :string #LogStash::Config::Path
+  config "host" => (lambda do |value|
+    # Use URI to validate.
+    u = URI.parse("dummy:///")
+    begin
+      u.host = value
+    rescue => e
+      return false, "Invalid hostname #{value.inspect}"
+    end
+    return true
+  ) # config "host"
 
   public
-  def initialize(url, type, config={}, &block)
+  def initialize(params)
     super
 
     @mq = nil
diff --git a/lib/logstash/inputs/beanstalk.rb b/lib/logstash/inputs/beanstalk.rb
index 87ed957ba..c251e1a39 100644
--- a/lib/logstash/inputs/beanstalk.rb
+++ b/lib/logstash/inputs/beanstalk.rb
@@ -5,10 +5,12 @@ require "logstash/namespace"
 class LogStash::Inputs::Beanstalk < LogStash::Inputs::Base
 
   config_name "beanstalk"
+  config :tube => nil   # TODO(sissel): needs validation?
 
   public
-  def initialize(url, type, config={}, &block)
+  def initialize(params)
     super
+    raise "issue/17: needs refactor to support configfile"
 
     if @url.path == "" or @url.path == "/"
       raise "must specify a tube for beanstalk output"
diff --git a/lib/logstash/inputs/internal.rb b/lib/logstash/inputs/internal.rb
index 44b5244be..a109ac558 100644
--- a/lib/logstash/inputs/internal.rb
+++ b/lib/logstash/inputs/internal.rb
@@ -9,8 +9,9 @@ class LogStash::Inputs::Internal < LogStash::Inputs::Base
   config_name "internal"
 
   public
-  def initialize(url, type, config={}, &block)
+  def initialize(params)
     super
+    raise "issue/17: needs refactor to support configfile"
 
     # Default host to the machine's hostname if it's not set
     @url.host ||= Socket.gethostname
diff --git a/lib/logstash/inputs/stomp.rb b/lib/logstash/inputs/stomp.rb
index e0403760e..7c3b52011 100644
--- a/lib/logstash/inputs/stomp.rb
+++ b/lib/logstash/inputs/stomp.rb
@@ -7,8 +7,9 @@ class LogStash::Inputs::Stomp < LogStash::Inputs::Base
   config_name "stomp"
 
   public
-  def initialize(url, config={}, &block)
+  def initialize(params)
     super
+    raise "issue/17: needs refactor to support configfile"
     @logger.debug(["Connecting", { :url => @url }])
   end # def initialize
 
diff --git a/lib/logstash/inputs/syslog.rb b/lib/logstash/inputs/syslog.rb
index 105a24e04..934dbcd6d 100644
--- a/lib/logstash/inputs/syslog.rb
+++ b/lib/logstash/inputs/syslog.rb
@@ -9,6 +9,10 @@ class LogStash::Inputs::Syslog < LogStash::Inputs::Base
 
   config_name "syslog"
 
+  # The address to listen on
+  config :address => nil # TODO(sissel): needs validation
+  config :port => nil # TODO(sissel): needs validation
+
   public
   def register
     if !@url.host or !@url.port
diff --git a/lib/logstash/inputs/tcp.rb b/lib/logstash/inputs/tcp.rb
index 37d71c300..7802055de 100644
--- a/lib/logstash/inputs/tcp.rb
+++ b/lib/logstash/inputs/tcp.rb
@@ -8,8 +8,9 @@ class LogStash::Inputs::Tcp < LogStash::Inputs::Base
   config_name "tcp"
 
   public
-  def initialize(url, type, config={}, &block)
+  def initialize(params)
     super
+    raise "issue/17: needs refactor to support configfile"
   end # def initialize
 
   public
diff --git a/lib/logstash/inputs/twitter.rb b/lib/logstash/inputs/twitter.rb
index 8e6ed6b1a..a8d8d1c85 100644
--- a/lib/logstash/inputs/twitter.rb
+++ b/lib/logstash/inputs/twitter.rb
@@ -7,6 +7,7 @@ require "logstash/namespace"
 class LogStash::Inputs::Twitter < LogStash::Inputs::Base
 
   config_name "twitter"
+  config :query => nil # TODO(sissel): Validation?
 
   public
   def register
diff --git a/lib/logstash/outputs/amqp.rb b/lib/logstash/outputs/amqp.rb
index 4de6b0e7d..6eca58388 100644
--- a/lib/logstash/outputs/amqp.rb
+++ b/lib/logstash/outputs/amqp.rb
@@ -9,23 +9,17 @@ class LogStash::Outputs::Amqp < LogStash::Outputs::Base
 
   config_name "amqp"
   config :host => :string
-  config :queue_type => :string
-  config :queue_name => :string
+  config :exchange_type => :string
+  config :name => :string
+  config :vhost => :string
 
   public
-  def initialize(url, config={}, &block)
+  def initialize(params)
     super
 
-    # Handle path /<vhost>/<type>/<name> or /<type>/<name>
-    # vhost allowed to contain slashes
-    if @url.path =~ %r{^/((.*)/)?([^/]+)/([^/]+)}
-      unused, @vhost, @mqtype, @name = $~.captures
-    else
-      raise "amqp urls must have a path of /<type>/name or /vhost/<type>/name where <type> is #{MQTYPES.join(", ")}"
-    end
-
-    if !MQTYPES.include?(@mqtype)
-      raise "Invalid type '#{@mqtype}' must be one of #{MQTYPES.join(", ")}"
+    p @exchange_type => MQTYPES
+    if !MQTYPES.include?(@exchange_type)
+      raise "Invalid exchange_type, #{@exchange_type.inspect}, must be one of #{MQTYPES.join(", ")}"
     end
   end # def initialize
 
@@ -41,19 +35,19 @@ class LogStash::Outputs::Amqp < LogStash::Outputs::Base
     amqpsettings[:user] = @url.user if @url.user
     amqpsettings[:pass] = @url.password if @url.password
     amqpsettings[:logging] = query_args.include? "debug"
-    @logger.debug("Connecting with AMQP settings #{amqpsettings.inspect} to set up #{@mqtype.inspect} queue #{@name.inspect}")
+    @logger.debug("Connecting with AMQP settings #{amqpsettings.inspect} to set up #{@exchange_type.inspect} queue #{@name.inspect}")
     @amqp = AMQP.connect(amqpsettings)
     @mq = MQ.new(@amqp)
     @target = nil
 
-    case @mqtype
+    case @exchange_type
       when "fanout"
         @target = @mq.fanout(@name)
       when "queue"
         @target = @mq.queue(@name, :durable => @urlopts["durable"] ? true : false)
       when "topic"
         @target = @mq.topic(@name)
-    end # case @mqtype
+    end # case @exchange_type
   end # def register
 
   public
diff --git a/lib/logstash/outputs/base.rb b/lib/logstash/outputs/base.rb
index c9fbb735a..15a87b80a 100644
--- a/lib/logstash/outputs/base.rb
+++ b/lib/logstash/outputs/base.rb
@@ -13,16 +13,18 @@ class LogStash::Outputs::Base
   config_name "output"
 
   public
-  def initialize(url)
-    @url = url
-    @url = URI.parse(url) if url.is_a? String
+  def initialize(params)
     @logger = LogStash::Logger.new(STDOUT)
-    @urlopts = {}
-    if @url.query
-      @urlopts = CGI.parse(@url.query)
-      @urlopts.each do |k, v|
-        @urlopts[k] = v.last if v.is_a?(Array)
-      end
+    if !self.class.validate(params)
+      @logger.error "Config validation failed."
+      exit 1
+    end
+
+    params.each do |key, value|
+      validator = self.class.validator_find(key)
+      #value = params[key]
+      @logger.info("Setting: @#{key} = #{value.inspect}")
+      self.instance_variable_set("@#{key}", value)
     end
   end
 
diff --git a/lib/logstash/outputs/beanstalk.rb b/lib/logstash/outputs/beanstalk.rb
index 5681d4db8..3ea691efb 100644
--- a/lib/logstash/outputs/beanstalk.rb
+++ b/lib/logstash/outputs/beanstalk.rb
@@ -5,9 +5,10 @@ require "em-jack"
 class LogStash::Outputs::Beanstalk < LogStash::Outputs::Base
 
   config_name "beanstalk"
+  config :ttr => :number
 
   public
-  def initialize(url, config={}, &block)
+  def initialize(params)
     super
 
     @ttr = @urlopts["ttr"] || 300;
diff --git a/lib/logstash/outputs/stdout.rb b/lib/logstash/outputs/stdout.rb
index bb339dc4b..a27b74001 100644
--- a/lib/logstash/outputs/stdout.rb
+++ b/lib/logstash/outputs/stdout.rb
@@ -10,10 +10,6 @@ class LogStash::Outputs::Stdout < LogStash::Outputs::Base
   def initialize(*args)
     super
 
-    @opts = {}
-    if @url.path != "/"
-      @opts = @url.path[1..-1].split(",")
-    end
   end # def register
 
   public
@@ -27,6 +23,6 @@ class LogStash::Outputs::Stdout < LogStash::Outputs::Base
 
   public
   def debug?
-    return @opts.member?("debug")
+    return @debug
   end
 end # class LogStash::Outputs::Stdout