RSS Stream displays your social feeds in a lifestream way.
This plugin adds a footer link to add the current post or page to a Facebook Mini-Feed.
Adds a Widget to display your Facebook/Twitter/Last.FM/Pownce status in your sidebar.
Facebook comments is a Wordpress plugin that will import comments from your facebook notes back into your wordpress blog.
Frame Free is a plugin to remove any frame created by Digg, Facebook, Google Images, Ow.ly and any other third party services.