BioWare has been friends with Dark Horse for quite some time and now the world of Mass Effect will join the bunch. Mass Effect: Redemption will be the title of the new four-part comic series and is expected to be release in January of 2010.
I personally happen to be a big fan of the book series written by Drew Karpyshyn. Mass Effect: Revelation explains events leading up to the first game and Mass Effect: Ascension ties happenings from the first game to the second. Dark Horse has vaguely explained that the comics will be focused during the time line of the second game.