Text Toilet

The US probably isn't quite ready for this yet, but with Finland's cellphone penetration up over 100% it's a brilliant idea.

Use SMS to Unlock Public Restrooms

If you need to use the facilities, people just need to send the word "open" to a short code listed at the bathroom, and the door is unlocked remotely. If the room is vandalized, a short-term record of the phone number that unlocked the door prior to the vandalism can help authorities track down the vandals.

(via 4Info Mobile Search Blog)