Changed the body method to accept blocks as well as strings. Also, added example calendar app to be built more in the future. Finally, added the respon_to block. View readme for example

examples/calendar/calendar.rb

@@ -0,0 +1,17 @@
+$LOAD_PATH.unshift File.dirname(__FILE__) + '/../../lib/'
+require 'sinatra'
+
+get '/' do
+  html {p "here, b"}
+  p "hi"
+end
+
+get 'index' do
+  html {body "in here!"}
+  body do 
+    "pancakes"
+  end
+end
+
+get 'favicon' do
+end

lib/sinatra/event.rb

@@ -56,8 +56,9 @@ module Sinatra
       @status || 200
     end
     
-    def body(value = nil)
+    def body(value = nil, &block)
       @body = value if value
+      @body = block.call if block
       @body || ''
     end
     

vendor/respond_to/README

@@ -0,0 +1,17 @@
+Respond_to
+
+Allows for different methods to be called upon in the event context block
+
+from
+
+get 'index' do
+  body "hey"
+end
+
+to 
+
+get 'index' do
+  html {"hi"}
+end
+
+If there is a block with the extension, that will be used as the output, otherwise the body of the block will be used.

vendor/respond_to/init.rb

@@ -0,0 +1,5 @@
+require File.dirname(__FILE__) + '/lib/responder'
+
+Sinatra::EventContext.send(:include, Sinatra::Responder)
+Sinatra::Event.send(:include, Sinatra::EventResponder)
+Sinatra::EventManager.send(:extend, Sinatra::DispatcherResponder)

vendor/respond_to/lib/responder.rb

@@ -0,0 +1,63 @@
+module Sinatra
+  module Responder
+
+    module InstanceMethods
+      def method_missing(id, *args, &block)
+        if block
+          @responds_to[id] = block unless @responds_to.has_key? id
+        else
+          super
+        end
+      end
+      def initialize_with_responds_to(i)
+        initialize_without_responds_to(i)
+        @responds_to = {}
+      end
+    end
+
+    def self.included(base)
+      base.send :include, InstanceMethods
+      base.instance_eval do
+        alias_method :initialize_without_responds_to, :initialize
+        alias_method :initialize, :initialize_with_responds_to
+      end
+      attr_accessor :responds_to
+    end
+  end
+  module EventResponder
+    def self.included(base)
+      base.send :include, InstanceMethods
+      base.instance_eval do
+        alias_method :attend_without_respond_to, :attend
+        alias_method :attend, :attend_with_respond_to
+      end
+    end
+    module InstanceMethods
+      # Pulls the request info from the REQUEST_PATH
+      #  it looks for the path extension
+      #  For instance, index.html will respond to the html block
+      def respond_request(request)
+        request.env['REQUEST_PATH'].include?('.') ? request.env['REQUEST_PATH'].split('.')[-1].to_sym : :html
+      end
+      def attend_with_respond_to(request)
+        context = EventContext.new(request)
+        begin
+          context.instance_eval(&@block) if @block
+          context.responds_to[respond_request(request)].call if context.responds_to.has_key? respond_request(request)
+        rescue => e
+          context.error e
+        end
+        run_through_after_filters(context)
+        context
+      end
+    end
+  end
+
+  module DispatcherResponder
+    def determine_event(verb, path)
+      EventManager.events.detect(method(:not_found)) do |e|
+        e.path =~ Regexp.new(path.split(".")[0..-2].join("|").gsub(/\//, '')) && e.verb == verb
+      end
+    end
+  end
+end