Well, as I type this I am using the 7 Beta... installation was flawless, finding all my hardware. So far installed Firefox, Adobe Reader, and Flash... seems to be working. The Fonts seems different. The explorer bar is different, not sure better, but have found that you can reorganize your apps on the bar without having to install Taskbar Shuffle or Taskix, which is a way overdue. UAC seems much less intrusive, in fact so far not even really bothered me like it does in Vista.

More to come... anyone else trying it?