http://www.terraria.org/
Does anyone play this? I just bought the game online. Its sorta like a combination of Castlevania and Minecraft, with randomly generated worlds. So far my biggest complaint is the sound in the game, I have to mute the sound because the in game music is awful, but other than that it seems pretty fun.
I think its better than minecraft. I would rather play a 2D side scroll, than a very crude and unrefined 3D combat system like Minecraft has.