I'm going to ressurect this old thread as I have the same question plus:
What's good that's downloadable? I don't really want to have a billion UMDs laying around, and I'm interested to see if there is any good "indie" stuff on PSN. Like, uh, Corpse Party. Has anyone played that?
I'm mostly interested in RPGs, but I like other genres like puzzlers as well. Oh, and I already have Persona 2: IS and the first Lumnies, and GoW: Chains of Olympus and Half-minute Hero are on the way.