diff --git a/lib/simplepay/helpers/notification_helper.rb b/lib/simplepay/helpers/notification_helper.rb
index 2e2d435..3098859 100644
--- a/lib/simplepay/helpers/notification_helper.rb
+++ b/lib/simplepay/helpers/notification_helper.rb
@@ -3,11 +3,40 @@
 module Simplepay
   module Helpers
     
+    ##
+    # Adds a +valid_simplepay_request?+ method to your ActionControllers.
+    # 
+    # In order to use this, you should just directly hand your +params+ into
+    # the method:
+    # 
+    #     class FooController < ApplicationController
+    #     
+    #       def receive_ipn
+    #         if valid_simplepay_request?(params)
+    #           ... record something useful ...
+    #         else
+    #           ... maybe log a bad request? ...
+    #         end
+    #       end
+    #     
+    #     end
+    # 
     module NotificationHelper
       
       protected
       
       
+      ##
+      # Authenticates the incoming request by validating the +signature+ 
+      # provided.
+      # 
+      #     (from within your controller)
+      #     def receive_ipn
+      #       if valid_simplepay_request?(params)
+      #         ...
+      #       end
+      #     end
+      # 
       def valid_simplepay_request?(request_hash)
         hash      = request_hash.symbolize_keys
         signature = hash.delete(:signature) || ''
diff --git a/lib/simplepay/helpers/rails_helper.rb b/lib/simplepay/helpers/rails_helper.rb
index a27733e..bf2f529 100644
--- a/lib/simplepay/helpers/rails_helper.rb
+++ b/lib/simplepay/helpers/rails_helper.rb
@@ -3,8 +3,23 @@
 module Simplepay
   module Helpers
     
+    ##
+    # Adds helpers to your views for generating the correct HTML FORMs and 
+    # valid signatures.
+    # 
     module RailsHelper
       
+      ##
+      # This is the general interface for generating your Simple Pay service
+      # forms.  See Simplepay::Services for available services and information
+      # specific to each.
+      # 
+      # === Example
+      # 
+      #     (in your view)
+      # 
+      #     <%= simplepay_form_for(:service_name, {:attr => 'foo'}) %>
+      # 
       def simplepay_form_for(service_name, attributes = {})
         service = get_simplepay_service(service_name)
         service.form(attributes)
@@ -14,7 +29,7 @@ def simplepay_form_for(service_name, attributes = {})
       private
       
       
-      def get_simplepay_service(name)
+      def get_simplepay_service(name) #:nodoc:
         service = "Simplepay::Services::#{name.to_s.camelize}".constantize
         service.new
       end