Civilization 5 (70h) - Majority of the time in the SDK looking at making a mirror map and documenting stuff for the CiV Wiki. Recently the Mongol Scenario came out and plays very well. Really captures the spirit of a highly mobile army hellbent on burning europe.
Minecraft (20h) - Tinkered a bit with multiplayer, then started building some challenges for myself in single player to make it a little more interesting. First the one tree challenge, then a spelunking challenge where you have to find diamonds while only modifying the landscape by 1 tile (makes you explore open caverns rather than dig to the bottom). Took Ben and I about 1 & 1/2 hours to finally find some in a huge cave system.
League of Legends (4h) - Might shelve this one now, player base is getting too narky.
Bejewelled Blitz (4h) - Some light entertainment after work. Been using the musical method of training where you start slow and methodical for 2 runs, then fast as possible for 2 runs regardless of position, then settle to fast & accurate runs.