I'll think I'll pass on this one. Ok, I might download it and see if it's better than beta 1, but I'm already using
Firefox 3.0a1 (aka Minefield, really just a pre-alpha) as my main browser, and that is remarkable stable. The only real issue I have is that it severely messes with my bookmarks, but as long as I'm careful in making (manual) backups of the bookmarks that doesn't bother me too much...
There are also some highly addicting features, like the Recently Closed Tab feature (now why didn't you, like Opera, implement this a long, long time ago?) and session restore.
Now off to save the Firefox profile...
Edit:
Hmm... it seems both mentioned features has made its way into FF2 since last Beta...
I might just "downgrade" to FF2 after all...