Alan Wake - 20-minute movie from South Korea
As opposed to North Korea. Pretty sure there aren't any Xbox 360's in North Korea. If there are, they're probably used as nuclear missile components, or something. Or as tables.
The movie's just popped up on AGB.
There's an awful lot of spoilering going on here, so be warned.
The torch-heavy, story-tastic, Twin Peaks-loving Remedy thriller releases on May 14 as a 360 exclusive.