Cookbook /
AddThisWidget  Embed the 'AddThis' widget to enable easy sharing of webpages on facebook, delicious, twitter, and other social networking sites.
EmbedTweet  a recipe to embed live tweets from using Twitter's oembed API facility (stable)
FacebookLinkInto  "Like" your wiki pages into Facebook.
ShareButtons  Social media sharing buttons without tracking or JavaScript (Experimental)
ShortURLs  shorten URLs using, including a markup expression and a function for further coding
Twitter  Display twitter-messages and twitpics from any member in your page.
TwitterPost  easily post updates to your Twitter account via PHP functions (not currently working, as of Summer 2010 - twitter has switched to OAuth - recipe to hopefully be updated soon)