The first details have been revealed of the DS version of Guitar Hero called Guitar Hero: On Tour. The DS version will feature the same \”play to the music\” gameplay of the console versions and will have its own peripheral called the \’Guitar Grip\’ that will let players finger chords. The Guitar Grip will plug into the Game Boy Advance slot and comes with a special stylus to let you strum the guitar. Activision are aiming to release the game this summer. Theres a video of it in action in the forums.