Keyless entry using your iPhone isn't a new thing, but Lockitron has introduced a system that allows keyless entry for your home with some extras geared toward the iPhone.
With the US$149 Lockitron, a box fits over your existing deadbolt and allows you to manage your door locks from anywhere via SMS or the Internet. It will allow you to share access with family and friends, which can keep you from running to the closest hardware store to get multiple keys made. If you have an iPhone 4S or iPhone 5, you also can use Bluetooth 4 to have your door automatically unlock as you approach it. With knock sensors, notifications and more, it's a pretty nifty gadget.
