what kind of bugs me is that it doesn't sound like there will be an option to upgrade to the full release. i hate installing from scratch, reinstalling programs, restoring all my data, trying to remember exactly how i had things set up, etc.
that aside i'm using the beta now and it runs like a champ on my $200 eee 900a, no messing with drivers everything worked out of the box. i'm a linux guy mostly but i'm pretty impressed with 7's netbook support.
not so on my 5 or 6 year old thinkpad. come on MS, you couldnt include a working diver for my intel wireless card? really? the ubuntu 9.04 alphas and betas had no issues whatsoever with it.