Indie games
the Shab al-Hiri Roach
http://www.rpg.net/reviews/archive/12/12312.phtml
Basically, its a roleplaying session, not campaign. This is kind of a party game rpg setup. I haven't played it yet, or read the rules even. I'm registered for a game of this at Dragoncon this year. The above review, by the way, is quite good.
Prime Time adventures
http://www.rpg.net/reviews/archive/12/12009.phtml
Another one I'm scheduled to try at Dragoncon. The players work together to roleplay a TV series, that they have designed. I'm iffier on this one than the Roach game (I don't watch a lot of TV, but I love the idea of telepathic soul eating roaches). Still, its suppose to have a lot of top notch GM advice on character arcs, pacing, etc, so I might get it.
Polaris
http://www.rpg.net/reviews/archive/12/12354.phtml
Haven't tried, probably will never get to try. Its next on my "to buy" list. I'm interested in it because it deliberately sets out to invoke a certain mythical atmosphere, and its a tragedy. Your character is doomed to die, his civilization to be destroyed, and his story forgotten. So its all about how well he dies. I'm a sucker for tragedy, and its something you don't often get in RPG's (or books, or movies much either). The Have games, will travel podcast as a session of this game recorded, for download. I haven't yet had time to listen to it though.
I tend to agree with one reviewer, who says that he hasn't seen any of the indie rpgs that he would like to play for more than a few sessions. But, I can't help but think that parts of these can be pulled and incorporated into more mainstream rpgs. Like Caliphate nights has done with framing. Which, I would like to get Caliphate Nights, but not for the price that they want... (Thats a problem with most of the indie games above, as well, they are pricey.....)
Several other Indie games I've heard lots of good things about - Dogs in the Vinyard, Mountain Witch, My life with master (I own this last one, but I'm not through digesting it).
Interesting stuff. I wish I had more experience with it.