I've heard rumors of that. I may still have a guitar hero controller somewhere. I wouldn't be able to play anything remotely approaching new, though. Those tend to be console-only, and the newest console I have is a PS2.
I never really liked Guitar Hero. The game mechanics were fine, and it has some nifty things that make it more "realistic" than Guitar Freaks (which is VERY much a "game" and actually plays quite differently than Guitar Hero), but I never liked the forced 3D note scroll that only took up some tiny fraction of the screen. Sound Voltex (a comparatively new arcade game from Konami, Japan/Korea/maybe China only, like most of the BEMANI titles) has a similar note scroll and, while I find it a fun game, I still don't like the note scroll style.
I've got a number of console controllers for all of those games from before I acquired the actual cabinets. Most of them are the standard consumer ones, but I have a full-size (ASC) pop'n music controller. Considering I still don't have a pop'n music cabinet (I should get one, some time since the game is awesome) I guess that was a reasonable acquisition back in the day. Let's just say that the console controllers are way easier to store than the whole arcade games. Those things are HUGE compared to a typical upright.