I have this on my door. PS. Galeeth and I had same idea. His thread: [thread=363561]What's the email for the president of physics?[/thread]. My thread: [thread=363183]xkcd provides some visual PF guidelines[/thread].
PPS. We should send Randall Munroe a bonus membership in PF. Searching for xkcd turns up 263 PF posts.
Thanks, Borek. I notice that Hurkyl added a link in the OP that wasn't there when I first read it. Now I know what it is, but the humour eludes me. Must be some kind of tech stuff that I haven't been exposed to before.