diff --git a/railties/CHANGELOG b/railties/CHANGELOG
index 86a31f1fbd..90e3a48102 100644
--- a/railties/CHANGELOG
+++ b/railties/CHANGELOG
@@ -1,5 +1,7 @@
 *SVN*
 
+* Add config.active_support for future configuration options.  Also, add more new Rails 3 config settings to new_rails_defaults.rb [rick]
+
 * Add Rails.logger, Rails.root, Rails.env and Rails.cache shortcuts for RAILS_* constants [pratik]
 
 * Allow files in plugins to be reloaded like the rest of the application.  [rick]
diff --git a/railties/configs/initializers/new_rails_defaults.rb b/railties/configs/initializers/new_rails_defaults.rb
index 0cc1993ed9..d10b16b06e 100644
--- a/railties/configs/initializers/new_rails_defaults.rb
+++ b/railties/configs/initializers/new_rails_defaults.rb
@@ -3,3 +3,9 @@
 
 # Only save the attributes that have changed since the record was loaded.
 ActiveRecord::Base.partial_updates = true
+
+# Include ActiveRecord class name as root for JSON serialized output.
+ActiveRecord::Base.include_root_in_json = true
+
+# Use ISO 8601 format for JSON serialized times and dates
+ActiveSupport.use_standard_json_time_format = true
\ No newline at end of file
diff --git a/railties/lib/initializer.rb b/railties/lib/initializer.rb
index d929fe81e2..05a71e6065 100644
--- a/railties/lib/initializer.rb
+++ b/railties/lib/initializer.rb
@@ -416,6 +416,9 @@ module Rails
           base_class.send("#{setting}=", value)
         end
       end
+      configuration.active_support.each do |setting, value|
+        ActiveSupport.send("#{setting}=", value)
+      end
     end
 
     # Fires the user-supplied after_initialize block (Configuration#after_initialize)
@@ -461,6 +464,9 @@ module Rails
     # A stub for setting options on ActiveRecord::Base
     attr_accessor :active_resource
 
+    # A stub for setting optinos on ActiveSupport
+    attr_accessor :active_support
+
     # Whether or not classes should be cached (set to false if you want
     # application classes to be reloaded on each request)
     attr_accessor :cache_classes
@@ -609,6 +615,7 @@ module Rails
       for framework in default_frameworks
         self.send("#{framework}=", Rails::OrderedOptions.new)
       end
+      self.active_support = Rails::OrderedOptions.new
     end
 
     # Set the root_path to RAILS_ROOT and canonicalize it.