This plugin will allow your twits to be automatically added to your Buddy Press wire. You must have 2 things: 1. WordPress MU, 2. Buddy Press
Note, TwitterToWire and Twire user/password information are now shared. As of version 1.2 and after Twitter To Wire is MUCH faster and easier on the server when TwitterToWire updates happen when someone visits your profile, not when they visit your blog.
Any questions please drop by http://codewarrior.getpaidfrom.us