From the Coolest Thing I've Seen All Day files: "Still Alive", the song from the end credits of Portal, done as a typographical video:

Whatever they have Jonathan Coulton do for Portal II (and really, if Valve doesn't have JoCo write another end-credits song for Ellen McLain to sing at the end of Portal II, they should get out of the games business immediately), they could do a whole lot worse than to present it as something like this.