Widgets is a ExpressionEngine 2.1 module that allows even your least experienced client or to manage chunks of intelligent content on there site without needing to learn loads of tags, HTML or call you in to help.
Widget Areas can be defined (header, sidebar, news page footers, etc) then Widget Instances can be added in. Available Widgets currently include HTML blocks, Twitter Feeds, RSS Feeds, Google Maps and Social Bookmarks, but more will be included with each release.
Preview video: http://blip.tv/file/4059118