One of my friends on IRC just pointed this out to me. Go to ESPN.com, and press the following key combination:
Up, Up, Down, Down, Left, Right, Left, Right, B, A
And hold down the enter key. Hilarious.
Update: Apr 27, 5:35pm 2009
They fixed it already. After you entered the code, any key press after that would cause a pony to pop up on the screen in a random place. Why oh why would you want to fix something as awesome as this?