Schlage has been tweaking their Internet enabled LiNK door lock system for a few months now, and its looking pretty good. Using the wireless Z-Wave standard, they've built their system to be the core of a complete home remote control. The door lock itself can be unlocked via internet, PIN pad or standard key.
The system works by using the kit's wireless bridge to interpret encrypted commands from the Internet, then transmitting those commands wirelessly to modules throughout the home. Anything from the front door lock to climate control and lighting can be configured in this way. Everything can be controlled via smartphone or standard web browser.
Now for the bad news, the starter kit, which includes the wireless bridge, one door lock and a lamp module is going to set you back $300. That's doable, but then comes the dealbreaker: A $13 a month subscription to their LiNK web service to control it all. We'll pass, but the technology is cool.