Very cute trailer for "The Guild" Trade paperback, that answers the above question.
The Guild gang are pretty excited about it...
...and if you've never heard the song they're playing, it's here http://www.youtube.com/watch?v=urNyg1ftMIU
(but there might be an ad first... yes, it's one of THOSE... yech)
and if you're wondering what the heck the title means, it's "Massively multiplayer online role-playing game"