Maybe this guy in Japan had an extra Wiimote at his disposal. So to utilize the spare Wiimote, he used it to open doors. The Wiimote sends signal to the door lock with the help of Bluetooth and twisting the Wiimote would let the door unlock.
DIY Page [Japanese]
[Via Engadget]
nokia says
Whats a wilmot, looks like a bad security threat there.
XBOX360 says
definatly bad security