Wearable camcorders are nothing new, neither are wearable spy cameras. This one is disguised as a Bluetooth headset. It is called the Looxcie 2. This sequel to the original is half the size and sheds some weight as well.
The two versions of the Looxcie 2 that are available are 4GB and 8GB capacities. They can record videos at resolutions of 320 or 480. Rumor is that it may also support iCloud. The 4GB version will give you five hours of recording for $180, while the 8GB one will give you ten hours for $199.