We'll just come right out and say it: Guitar Hero and Rock Band should watch their back, 'cause there's a better-than-decent chance that Power Gig will be all the rage this holiday season. Seven45 Studios is a heretofore unheard of upstart with roots in First Act, and unlike the vast majority of game developers, these guys actually have a direct hand in the production of the software and hardware associated with this package. They'll be designing the Power Gig video game series (Rise of the SixString is only the first installment) as well as the guitars, drums and microphones in-house, and given the First Act roots, you know yo