Bluetooth lock/unlock Ubuntu

I don’t have a Bluetooth phone, but this kinda makes me want one.

Howto: Use BlueProximity and your cellphone for security – Ubuntu Forums

BlueProximity is a clever program that sets up your computer to lock itself when your phone is out of bluetooth range, and unlock itself when it comes close enought again.

Basically you walk up to your laptop – it unlocks. You walk away – it unlocks.