I have been looking to get that, but I haven't updated to Lion or Mountain Lion yet, plus I think I can wait till I get the GOTY edition. I can wait out the DLC.
Latest purchase was for
Weird Worlds: Return to Infinite Space a space rouge like where you have a set amount of time to explore a sector of space for riches and glory or die trying. It's randomly generated so no two games are the same. It runs on windows but has an offical but unsupported Mac OSX\9 version that require Rossetta so it can't be played on anything higher than Snow Leopold.
It's pretty fun and sometimes a game can feel a bit short, although it's by design. FTL per game is longer than this. The combat can be a bit frustrating as most foes have a clear firepower and numerical advantage over you, however it can become something of a turkey shoot once you manage to get the ball rolling with the right tactics. The interface could do with some work as it feels like something from 10 years ago and the lack of numbers or detailed descriptions telling you what something does can be annoying, forcing significant amounts of trial and error.
Not a bad time waster for 2 or 3 bucks.