Zimbra Desktop Beta 3!
Zimbra Desktop Beta 3’s New Features » Zimbra :: Blog
Lots of new stuff: Tasks, Docs, Briefcase, auto service start, mailto: link handler, new mail & appointment notifications (sound/visual methods), Prism minimize handling, Mac doc area & Windows systray menus, as well as Yahoo! IMAP access through special Zimbra Desktop auth for all account types: business, plus, partner, & even free.
Thanks to all for your error reports, bug corrections, enhancement requests, and general feedback thus far!