I bought Beautiful Katamari for the 360, which is cheap by that standard ($40). Unfortunately, it seems to be the bastard child of the series. It's criminally short, and gee, isn't it nice that there's going to be download content to make up for that, like starting today. It's the worst scenario of DLC abuse in the flesh. I guess the argument will be that as long as the whole thing stays under $60, you didn't get reamed a new asshole. I don't quite agree.
It's still a Katamari game, though, and I have a weakness for those. Everything works as before, sparse though it may feel in comparison to the best, which imho is We Love Katamari (PS2). The graphics are no more detailed, but they are very sharp and fluid at 720p, and there is no load time as the scale changes, from puny to planet-sized.
I also grabbed Orange Box (360) although I have yet to touch it, and Crash of the Titans (360) on the strength of the demo, also so far untouched.
On XBLA, I tried Exit, released yesterday. Looks like a perfect port of the PSP version. I almost paid for the full game, but there was a problem with XBL not being able to retrieve info on my account. By the time that straightened itself out, the impulse passed.