You guys play any of these? I've got a couple and in the case of one in particular (Lasercat) it was well worth the 80 ms points. Chutlulu saves the world is also a fun and humerous little rpg but it;s a bit more expensive.
I don't have any indie games on the 360. I've just never bothered to wade through the pure crap in the indie game marketplace just to find some that are worth a few bucks. The only one I've even really considered buying was I Made a Game with Zombies in It! but since I'm not exactly great at twin-stick shooters I've mostly been satisfied with the demo.
I go through them sometimes to laugh at the hilarious-looking ones (such as below) but otherwise I've never bought one.