Just saw a commercial for the iPhone app and blew my mind -
http://link.schlage.com/Products/Pages/Products.aspx
You can add a dead bolt, door knob, camera, electrical outlets and thermostat... all controlled over the internet or smart phone
I'm seriously considering going to pick this up tomorrow morning at Lowes. I hate going out and worrying about loosing my keys, and I'm always working when I have a friend come to the door and this would be perfect to unlock the door for them.
On my front door, if you dont lock the dead bolt, the door can open as the lock on the knob doesnt line up exactly (I rent an apt). Ive had it happen and my cat got out twice.
Thermostat Im not really worried about, but controlling lights would be cool too, and beign able to pull up in my car, unlock the doors with my phone so I dont have to put down bags of groceries to pull out my keys would be amazing!