Lunacon Promo-Page

Every March, I go to Lunacon, a great science-fiction convention held in Rye Brook, NY. For the past few years, I have printed out a sheet or two of comics from this site. Nothing too fancy: just four or five (x, why?) comics, along with a logo and the URL for the blog and the comics-only site. Simple little promotion, and cheaper than bookmarks. (Actually, I looked into bookmarks once, but apparently, my comic dimensions and resolution are all out of whack.)

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.