Looks like review copies are out there now.
Played a bit of it before D&D tonight, as one of our guys is the entertainment editor for the city paper. I can't say much about it, thanks to the press embargo, except for the new instruments felt pretty good, it looks a little shinier but very much familiar, and 'No Fail Mode' is there but off by default.
Nothing really new to report, though, since it was just a bit of quickplay. Just go read sort of stuff people have already mentioned from preview events at cons. I'd say I'll find out more next session, but it'll be almost released by then, anyway!