This is probably as geeky as it gets. Liberated Pixel Cup, a free (as in speech) game making contest sponsored by the CC, FSF, Mozilla and OpenGameArt.org, references one of the best XKCD comics in their kick-ass HTML5 demo.
Meeting Bobby Tables
To meet Bobby Tables: when the Liberated Pixel Cup demo loads move all the way to the left until a new screen is loaded (separated by a black bar). Then move some more to the left until you see Little Bobby standing beneath two trees. Talk to him and then you can even play as Bobby Tables :)
The original XKCD comic that was referenced:
