Thanks to Cryton for pointing this out in Back Page News.
Mozilla has recently released the next alpha version of Bon Echo (which will become Firefox 2), Bon Echo Alpha 2. This version is a huge step up from the Alpha 1, which seemed to have no changes besides the close button being moved on to the tabs (of course, there were more changes than could be seen by the naked eye). Among the new features are an RSS reader (similar to that of Safari and the one to be included in Microsoft Internet Explorer 7), a spell checker, and automatic restoration of your Firefox setup after a crash. This release is also a huge step up from Alpha 1 on a stability standpoint; many less crashes than before.
Amazingly, many more features are expected in the Alpha 3 in just a few weeks, including anti-phishing. What seemed to be a release that was overrated and unexciting has suddenly become a huge step up from Firefox 1.5.
This is ALPHA software, please use caution when installing it on your system!