There's a nice comp running over at www.unchartedps3.com; a Google Maps-powered Uncharted: Drake's Fortune (ARG) alternative reality game. Track down Nathan Drake first and the prize is two return flights to Cancun, seven nights all-in accommodation in a four star hotel and two activities - GPS scavenger hunt and snorkel, and a submarine trip. Ten runners up bag a 26? TV. The comp runs until the end of January.
Ah yeah, and if you're a bit handy at this treasure hunting caper, best not to post your solutions to the tasks on here, as you'll only have a slew of other contestants stealing a march on you!