Well, here we go again. Build 7068 is out, in both 32 and 64 bit. Downloading now. I will probably do a clean install this time as I think I'm pushing my luck with all the upgrades. (Did upgrades from 7000 --> 7048 --> 7057.) I know I should just wait for the RC in May but I can't help myself. I'm helping the economy by going through so many DVDs.
Here's a good Windows 7 site:
Windows 7 Center