From the press release:
On the Entertainment Channel, watch for the upcoming arrival of the Marvel Universe as Super Heroes, mutants, aliens, armor-clad super-geniuses and thunder gods join forces with the Starbucks Digital Network on Apr. 23, 2011. Known for engrossing stories and a library of more than 8,000 characters, Marvel Comics gives Starbucks customers unlimited, free access to its full library of Marvel Digital Comics Unlimited. Spider-Man, Iron Man, Thor, Wolverine and others await to captivate as customers explore the comic realm and imagine fighting villains with a cup of coffee in hand.
Needless to say, that is extremely awesome. It will definitely get me going to Starbucks more often (which, admittedly, is already pretty often). Hell, they will have a hard time getting me to leave.