Knights of Honor (10h) - Picked this one up off steam after Greig mentioned it as a Crusader Kings alternative. Breaks apart pretty easily once you put a lot of traders in place.
TrackMania Nations (5h) - Ran the computer game stall at the St Luke's Day carnival for the school. Lots of new kids initiated into the wonders of TrackMania.
Hinterland (4h) - Finished off hard mode with no town support.
Tower Bloxx (2h) - An update to the lite version came with facebook interaction when playing the quick game. Made enough difference for me to part with the 2 bucks for the whole game. Very slick and suits the iPhone well. Another keeper for that minute or 2 break.
Rollercoaster Tycoon 2 (2h) - Cameron is playing this a lot, so I've been called over to "help out" every now & then. Quite good for spatial awareness and physics, but the cost models and deeper strategy are beyond him at the moment.