Ooo, a final release? I've been running ff3 since beta 2, using RC 1 at the moment, but where I've been doing exams and things I've not turned my laptop on and got the update... Good stuff, I'm happy with this news
You guys will find you can probably get *some* of your incompatible addons to work by downloading the file, opening it up with 7zip/winrar/winzip/whatever, and fiddling with a couple of lines of code (I can't remember the file name, but in one of them there's a line which tells firefox which versions the extension's compatible with - just change that to 3)
Found my first problem with Firefox 3 - It blurs some images! It's all to do with the new scaling system and apparently there're something in the pipeline but still I find it really annoying.