I normally wait for final releases, but I decided to download and install Firefox 3 Beta 4 yesterday. I guess I gave in because of the numerous performance tweaks in Beta 4 and the fact that I had heard Firefox 3 uses native Aqua widgets on Mac OS X. I am really glad I installed it. This beta is much faster than Firefox 2, feels faster than Safari 3, is certainly more stable than Safari 3 with Sogudi installed, and looks awesome out of the box. It won me over within minutes, and it is now my default browser. I can't wait until the main release.