Though, it is still in beta, I have to try it. Windows 7. I guess Khmer unicode may run much better in this beta. Can't wait and now downloading from torrent. I will tell you more, if I find something exciting. I think something new will stimulate our brain...
Gizmodo gives some guides to make your life easy when trying 7.
Lifehacker tells you how to make your XP looks like 7.
Lifehacker tells you how to make your Vista looks like 7.