The 20 second clip above shows Guitar Hero III for BlackBerry in action. I forced one of the friendly folk working the RIM booth to play it while I caught the clip... she didn't do so well in the 20 seconds I caught on film but that's ok, we won't hold it against her :-)
So if you saw the press release this morning and have been thinking about buying it, the capture above gives a good sense of the game play. You only use 3 "strings" (they scaled back the full-blown app to work on the Berry, and apparently the 3 strings was all the Berry could handle) but the graphics were good and the game play was addicting and fun nonetheless. I gave it a whirl and will definitely be picking it up for myself as soon as I get the chance!