The punchline on today's Jack of All Blades web-comic riffs off my fave xkcd episode — the one where I'm outed for my practice of blogging from a hot-air balloon while wearing goggles and a red cape.
(Thanks, Joe!)
See also:
Geeky comic strip uses Cory as the punchline
Cory Doctorow cosplayers at the XKCD picnic
Update: From the comments, "Cory (A Different One)"'s revelation that this was his Hallowe'en costume!