Personally I am not going to be using Firefox 2.0 until at least a single point-release is out, but if you would like to use Firefox 2.0, and you're on the Mac, I suggest checking out the optimized builds.
No idea what Firefox is? Using a program called Internet Explorer? Please do yourself a favor today, and learn about Firefox.
Update: My boy Stamuel has posted some information on these builds.
[tags]optimized, build, firefox, applications, software, macintoshm, apple, mozilla[/tags]