Penny Arcade Subway Poster
Ah yes! They are Tycho and Gabe, from from the online web interstrip, Penny Arcade. This was originally going to be for one of the limited edition prints, but when readers let us know that they were ready for something with the CTS we used it as a poster instead. People seem to like it.
17" wide x 24" high, printed on 80 pound cover stock (aka nice, heavyweight paper) with an aqueous coating.