We usually pass on the cheap gizmos peddled by Thanko, but every now and then they come up with something pretty cool, such as these sunglasses with a built-in HD camcorder.
With a camera lens tucked neatly into the middle of the nose piece, these glasses will shoot 720p video at 30 frames per second, and record it onto an MicroSD card in one of the earpieces. That's about the same resolution as an iPhone 4, but with the advantage that you don't have to hold your phone out in front of you. If all you want are still pictures, the glasses can shoot JPGs at up to 12-megapixels.
Thanko says they're great for catching video while skiing, fishing or biking, but I can imagine plenty of less wholesome sounding ways to use these. Unfortunately the extra thick earpieces kind of give the game away when you're trying to be discreet with your videography, but perhaps you could grow your hair out to keep things covered up.
The HD video sunglasses are available now from Thanko in Japan for around $74.