This isn't the first Attack on Titan figure I've seen, but it is the coolest. A 1/6 scale version of Mikasa, she won't be out until July 2014. Pity.
When she does hit, though, she'll cost around....USD$240. Which is a lot for a figure, yeah, but hey, at least it's an incredibly detailed one, with multiple wardrobe options and interchangeable faces (and haircuts!).