Are there any recent favorites, say, from the past year or two, that I should use? I'd lean toward the standalone jokes, not requiring background knowledge of the characters. And because it's a science fiction convention, the geekier or more "science-y" the better -- but only if the science is right. And, of course, there has to be some math and logic because that's the focus of the strip. I don't want to give the wrong impression.
Ideally, I would have to include my main characters, both human and numeric. Maybe the shapes as well, but there aren't any who stand out as characters.
I'm throwing the door open to suggestions. Either list them in the comments or email me or tweet me.