Today I recieved the Kevo Bluetooth Enabled Deadbolt for iPhone, and I have to say, this is pretty slick. Installation took about 10 minutes to remove the old deadbolt and install the new one. From there it was as simple as installing the app from the app store and registering. Once I was registered it paired quickly with my phone and was operational in minutes. Now I simply touch the lock with my phone still in my pocket and the door unlocks!
The Kevo system runs on four AA batteries, and it says they should last a year or more. The system also includes a keyless entry fob that when calibrated can stay in your pocket and identify itself just as the phone does for those folks you have that need access but do not have an iPhone. It also includes two standard keys in case batterries die or something goes wrong with the programing.
I was able to send electronic keys to my whole family in about 5 minutes so that they have them on their iPhones, and programming the two extra keyless entry fobs they sent took seconds each.
In all this is a very simple to use system that brings my door lock into the 21st century quite simply and easily. Highly recomended.