As we reported yesterday, Microsoft's doing some marketing stuff with COG tags in the run up to the launch of Gears of War 2 on November 7, and it looks as though the first site to get in on the action's Eurogamer.
You can win one. Apparently there's "more to it than meets the eye" as well, so there's lovely. Also up for grabs is a copy of Beneath the Surface: An Inside Look at Gears of War 2, signed by Cliff Bleszinski.
You want a COG tag and a book, right? Off you go, then.