Would also be cool with some statements from the games call outs or for example a text and some art that only the pinheads would know. Maybe some art piece from monster bash and a text with let's say "I'm scared of the moon", or "Melbourne cadaver club". Or "I see you!" And a pic of pinbots face. You get the idea =) even a plain text that says "For amusement only" in the appropriate font would be cool.
Btw I like the bop shirt.