Electronic Door Lock

Another project is in order. This time the idea is fairly simple. I want to electronically open the dead bolt on my door. The catch is I can't permanently modify the door in any way. Also, I want the installation to look professional from the outside of the door. This brings me to the main purpose of this project: impress all the ladies. A geek with an electronic gizmo on his door must get noticed by all the ladies right? Here's to hoping.