It's not really the beta, since it's a Milestone. It's technically alpha, but if you compare 7 to the Longhorn 3xxx and 4xxx, this one is stable, as they just add things, correct things, and basically makes it really obvious and easier to use. If you look at Paul Thurrot's blog in Vista, he says "It's Vista done right." and I agree. BTW, if you want to take it in for a spin, the torrents leaked it and it's one very active torrent. The 32-bit is more active than the 64-bit...figures.