I actually had no idea this was coming out, but as a reader of all 12 volumes, this is definetally worth checking out, especially if you haven't read the manga yet. The story and style are very sophisticated, and surprisingly mature, not in a content way, but in a more "take this seriously" kinda way.
All in all, check it out this Saturday at 12:00 midnight on Adult Swim, as this is pretty much this year's next big Anime.
http://www.icv2.com/articles/news/11330.html