Tonight I played Torchlight. Torchlight is a top-down dungeon-crawler RPG, essentially a Diablo clone. The art style is significantly different from Diablo, as it is much more colourful and a bit blocky.
It's pretty fun, but if you are looking to scratch the Diablo itch I would go for Diablo II or Diablo III as it feels like it's missing some special ingredient. There is a sequel out, so one of these nights I'll have to take it for a spin.