Triforce on MIT Dome
Clara noted this on the web before I did (kudos to Bryan O. '07), despite the fact that I'm currently in Boston and she's in Atlanta. I'm verifying that there actually is a Triforce on the Great Dome on the MIT campus, commemorating the launch of the Wii this past weekend.
For those who haven't figured it out yet, all the contributors to Game Eaters are MIT alums, so hacks such as random sculptures on the Great Dome are part and parcel of our collegiate experience. It's always heartwarming when the prank takes a form related to one's favorite hobby, though!