Neowin on a roll today: "Beta 2 of Mozilla Firefox 2.0 has just appeared on the Mozilla FTP in the release folder"
I'm not sure what 2.0 is going to give us (I primarily use IE7RC1 at home, and IE6 at work), but hopefully it won't randomly use 97% of my CPU like it (Firefox 1.5.0.6 - which I use because GCal doesn't work with IE7 yet) does now.