ONUOsFan is a PS3 guy, so no, the GH guitars do not work with RB
(I don't have a PS3, but FU Activision, that's so lame to prevent the Harmonix patch to allow everything to play nice...)
To be fair all around too, Rock Band is currently releasing 3 (not 5-10, thank god, im going through 'MS Points' as it is) songs a week, but with 3 songs/week... 52 weeks... obviously there will be some larger weeks in there to hit 200, and thats cause of the full album downloads. The Who's greatest hits is expected to be the first album released... 'soon'. Nirvana Nevermind and a Metallica album are also comin.