Those looking for a 
Mass Effect fix in time for the PC and Xbox sequel to roll around can feast their eyes on the franchise's first comic book, called 
Mass Effect: Redemption. It follows the premise of 
Mass Effect 2 and covers the disappearance of Commander Shepard, and what happens in the meantime.
According to 
Comic Book Resources, the lead writer of 
Mass Effect 2 is involved in 
Mass Effect: Redemption, with scripting duties handed to John Jackson Miller (of the 
Star Wars: Knights of the Old Republic adaptation) and drawings by Omar Francia (who also inked 
Star Wars: Legacy).
The comic is due 6th January 2010, giving everyone a chance to get some backstory and arm themselves with some good canon before 
Mass Effect 2 releases.