Anyone know of any fun one dollar games? I just bought one on XBL Indie games. It's called "Murder Miners".

It's a fun mix between Halo and minecraft, with really nice map building tools. (You can even build in the middle of a deathmatch)

Edit: as of now I'm having a lot of fun with the zombies mode.

I bought Super Hexagon for $1 and it was worth it. The GF and I got rather competitive over it, and it appealed to my taste for chiptunes. I think it sells for $3 now, though.