I’ve mentioned my appreciation for XKCD here before and the site is constantly lurking over there on the right in the “Stuff That Rocks” listing for a reason.
What I really dig about XKCD is when the writer/illustrator—who is about a bajillion times smarter than I could ever hope to be—goes off and creates a comic that is completely random and absurd and just happens to be something I’ve thought about myself.
The dude posts all-kinds of super brainy things and then he’ll randomly come along and drop something like today’s comic:

It has nothing to do with the space time continuum or techie-computer nerd lingo, it’s completely out of left field and it’s something that I’ve thought about myself.
I freakin’ love this guy.