One important bit of news is that Firefox 2 will be maintained for another five months until mid-December 2008 at which time everyone should upgrade to Firefox 3
PING! to your list.
MajorGeeks.com has a 3.0.1 release of Firefox, but the Firefox/Mozilla website doesn’t have the release notes updated for it.
http://www.majorgeeks.com/Mozilla_Firefox_d2248.html
Firefox 3 was incompatible with my two most useful add-ons. I dumped it immediately.

IMHO FF 2.0.0.x is just hitting its stride with all the extensions/themes/plugins I use.
The version of 3 that I have on my Linux box isn’t quite there yet.
I’m holding off on upgrading for the same reasons you are.