I've just installed the latest alpha build of Firefox 2.0, and things are looking real good. The Burning Edge has a change log for this latest release, displaying what's new between these alpha builds and the current 1.5.0.x line of Firefox browsers. Alpha 3 adds session saver support, anti-phishing support, search suggestions in the default search box, and more. If it proves stable enough, I might just switch to this alpha build for my main browsing platform. The inline spell checking feature is great!