Firefox 3 alpha 1 is already onto release candidate 3 but there aren't any new features that you can visually see, well, you know what I mean.

I'm sure it will be released around the same time they are releasing their other milestones: December 14. I have actually had to move away from using Firefox 3 as my primary browser because too many things were being broken by checkins that people were making. I use it from time to time but I'm back to Firefox 2 for a few weeks until they get some of the more annoying bugs ironed out.