I seem to remember reading something about a potential anthology of work from the webcomics collective ACT-I-VATE, but I don't think I've seen a formal announcement yet -- unless an Amazon.com listing is considered an announcement.
In any event, it looks like IDW is putting out the ACT-I-VATE Primer in the fall. The book is due Oct. 29, and the site lists the contributors as Dean Haspiel, Nick Bertozzi, Michael Cavallaro, Mike Dawson, Simon Fraser, Michel Fiffe, Tim Hamilton, Ulises Farinas, Leland Purvis, Joe Infurnari, Roger Langridge, Molly Crabapple, John Leavitt, Pedro Camargo and Jim Dougan.
Haspiel, it appears, will have a new Billy Dogma story in it (which is, I bet, where we'll see this), while Langridge says he's doing a "Mugwhump" story set before the current strip started. According to Amazon, all the material will be new: "The ACT-I-VATE PRIMER is a PRINT EXCLUSIVE anthology by many of the Act-I-Vate creators none of the material in this book will appear on the Act-I-Vate website for at least one year from publication date."