It's a good day for downloads! In addition to Thunderbird 2, there's the newest version of Ubuntu, "Feisty Fawn." Ubuntu is the free, easy version of GNU/Linux that runs on practically any hardware and is so easy to set up and install that it can be administered by regular users. I've been using Ubuntu exclusively since last October and I love it (and yes, I'm still working on my long-promised Ubuntu article. Classes end soon — I'll have some more time once I've turned in my students' grades).
Feisty Fawn has something from everyone: server virtualization enhancements, better video- and audio-editing, a Windows desktop migration tool to ease the pain of switching, easier multimedia codecs, and easy print- and file-sharing over WiFi.
(via Digg)