RedOctane's rock star simulator Guitar Hero 2 is coming to an Xbox 360 near you, and TeamXbox has the pictures to prove it:

Details on this 360 port have been scarce, so these pictures are pretty telling: Extra songs? Check! downloadable content (even more songs, presumably?) Check! Bad ass white guitar? Check!
I've held out on the PS2 version for this port – let's just hope that the downloadable content is actually, you know, stuff you download, and not licenses in disguise.