The tile game's out of order just now, hope to have it fixed soon, sorry.
Click on a tile to make it slide into the space. You can slide several tiles at a time by clicking a tile that is not adjacent to the empty square. Click Scramble to start. When you're done the image should look like this and the missing tile should be in the bottom right corner.
If you're using a supported browser (FireFox Mozilla, IE for Windows,
or Opera 7), this text will be replaced by a sliding time game.
Thanks to Jesse Ruderman for the game code.