diff --git a/README.rdoc b/README.rdoc
index 36ae110..2c2e167 100644
--- a/README.rdoc
+++ b/README.rdoc
@@ -1,5 +1,11 @@
 = Mobile Fu
 
+
+This fork adds the ability to ignore curtain request formats from being mobilized. You might want to return JSON for :json or :iphone mime types and not let mobile_fu convert your format to :mobile.
+
+Usage example at the end of this file.
+
+
 Want to automatically detect mobile devices that access your Rails application?  
 Mobile Fu allows you to do just that.  People can access your site from a Palm,
 Blackberry, iPhone, iPad, Nokia, etc. and it will automatically adjust the format
@@ -86,13 +92,24 @@ http://blogs.pathf.com/agileajax/2008/05/rails-developme.html
 
 Hopefully this should help you create some awesome mobile applications.
 
+== Ignoring specific request formats
+
+If you want to ignore specific request formats you can just pass ':ignore_formats => [<array of your formats>]' as second argument to has_mobile_fu.
+NOTE: If you want to pass :ignore_formats you'll have to pass the 1st argument (test_mode). If you don't know what to put in just pass "false".
+
+example:
+  class ApplicationController < ActionController::Base
+    has_mobile_fu false, :ignore_formats => [:iphone, :json] 
+  end
+
 == Testing Mobile Interface
 	
 If you want to force the mobile interface for testing, you can either use a 
-mobile device emulator, or you can pass 'true' to has_mobile_fu. 
+mobile device emulator, or you can pass 'true' as first argument to has_mobile_fu. 
 
+example:
   class ApplicationController < ActionController::Base
-    has_mobile_fu(true) 
+    has_mobile_fu true 
   end
 
 
diff --git a/lib/mobile_fu.rb b/lib/mobile_fu.rb
index dabd611..06d55d3 100644
--- a/lib/mobile_fu.rb
+++ b/lib/mobile_fu.rb
@@ -26,11 +26,15 @@ module ClassMethods
       #    class ApplicationController < ActionController::Base 
       #      has_mobile_fu(true)
       #    end
-        
-      def has_mobile_fu(test_mode = false)
+
+      def ignored_formats; @@ignored_formats; end
+
+      def has_mobile_fu(test_mode = false, options)
         include ActionController::MobileFu::InstanceMethods
 
-        if test_mode 
+        @@ignored_formats = options.has_key?(:ignore_formats) ? options[:ignore_formats] : []
+
+        if test_mode
           before_filter :force_mobile_format
         else
           before_filter :set_mobile_format
@@ -55,10 +59,18 @@ def is_device?(type)
     end
     
     module InstanceMethods
-      
+
+      # Check if the current format needs to be ignored
+
+      def should_ignore_format
+        return self.class.ignored_formats.include?(request.format.to_sym)
+      end
+
       # Forces the request format to be :mobile
       
       def force_mobile_format
+        return if should_ignore_format
+
         if !request.xhr?
           request.format = :mobile
           session[:mobile_view] = true if session[:mobile_view].nil?
@@ -69,8 +81,10 @@ def force_mobile_format
       # the user has opted to use either the 'Standard' view or 'Mobile' view.
       
       def set_mobile_format
+        return if should_ignore_format
+
         if is_mobile_device? && !request.xhr?
-          request.format = session[:mobile_view] == false ? :html : :mobile
+          request.format = session[:mobile_view] == false ? request.format : :mobile
           session[:mobile_view] = true if session[:mobile_view].nil?
         end
       end
@@ -101,4 +115,4 @@ def is_device?(type)
   
 end
 
-ActionController::Base.send(:include, ActionController::MobileFu)
\ No newline at end of file
+ActionController::Base.send(:include, ActionController::MobileFu)