Mozilla has placed the files for Firefox 2 Beta 2 on their FTP. The release notes page is currently up but the download links that they have do not work. Here are the direct links for the downloads of the English versions:
I’m working on putting the portable version together right now and it should be up in a few minutes. Check back soon and if you decide to install it make sure you enjoy the new theme.
Also, you won’t find the new tab changes that I mentioned last night. Those are only in the most recent nightly build that they have released.