I'd have to go with Where's Waldo? and Where's Waldo Now?
Hmmm, that gives me an idea for a community project. I'm no good at backgrounds, but if someone draws a large background with some expansive blank spaces that could be passed around for everyone to slot a couple of their characters in, after a while we'd end up with a pretty good find/identify characters Where's Waldo game where readers look for the characters from the site they found it on (and GunBaby).
Maybe someone draw a character doing something, then the next person does a character reacting to the first one, plus another character initiating another action and so on. It'd need to be passed around quite a lot to get to full Waldo complexity (and a size limit for characters would have to be agreed upon) but it could be really cool.
Off-topic, I know, but would people be interested?