I've heard of, and seen screenshots of Frets on Fire. And the USB guitar controllers (at least the X-plorer) are supposed to work. Guitar Hero is horribly addictive.
I as well am kinda bummed the 80's version won't be out for Xbox.
Dunno if Saturday night is a good night or not. I've got a dinner with my Plague Rats group (the group I go to GenCon with in the first place) and am probably going out for liquid refreshment afterward.
--CT