Firefox 3 Beta 1 is out! Check out the pretty sweet list of changes.

If you want to try it, you'll probably want to run Firefox 3 and Firefox 2 at the same time. Only this time you should remember to rename Firefox 3 so that it doesn't override your install of Firefox 2.

I'd blogged about some of the changes previously if you care for some screenshots of some of the new features (Mozilla Links covers a good number of new Firefox 3 changes too):