A NEWER VERSION HAS BEEN RELEASED:
I've posted a development test release of Spicebird for testers. It's basically an email, rss, PIM and IM application suite based on Thunderbird, Sunbird and xmpp4moz. It's a little early in its development cycle (pre 1.0 release) but there's been some interest in it, so I got permission to do a version.
Please share opinions and thoughts on this new app.
Spicebird is a trademark of Synovel and is used with permission.