A few details emerge on Guitar Hero 360.  I'm far more excited about this than I possibly should be given that I've played this a lot on the PS2 already.  But the idea of downloadable content + achievements is incredibly compelling.  Achivements in general are far more addictive than they have any right to be... Xavier and I finished playing Marvel Ultimate Alliance this evening and while I'm pretty much done with the game, I'm still considering whether I just want to go back and scam out a few of the easy achievements I missed the first time around...