ArsTechnica, Lifehacker, 456 Berea St, Neowin.net, BetaNews and many others are reporting that while Firefox 2.0 has a scheduled release for tomorrow, the download is live. Get it for yourself: Win32, Mac, Linux. Update: It may not be final after all.
Update 2: It is really out now. It seems as though they were working out Windows and perhaps Mac bugs because the MD5 sum for the Linux "final" is the same as RC3.