After an intense session of Rock Band from Harmonix -- we totally nailed the vocal for Stone Temple Pilots' "Vasoline" by the way -- we noticed that the guitars had dangling wires tethering them to the Xbox 360. Considering the game has been widely advertised as having wireless guitars, this made us curious. Remembering the recently leaked price memo, you may recall that the wireless 360 guitar was listed at $79.99 while the PS3 guitar was listed at $59.99. Some have speculated that the 360 discrepancy is the result of having to pay Microsoft to use its proprietary wireless technology. Is MTV Games making cheaper wired guitars for those that can't afford wireless? Mmm ... could be.