For the past couple of weeks Makers Local 256 has been working on a USB authenticated deadbolt unlocking servo mechanism.
There's a wiki page up here showing some of the design notes. Here's a video of the project in action:
Click to view
The comments are hilarious :)
So far this is my favorite:
"Frankly, I just feel better knowing that rock & roll singer and impresario Meat Loaf is as interested in tech-enabled home security solutions as he is belting out guitar-rich, fully-orchestrated rock ballads."
~Gizmodo Comment