This Car Key Camcorder looks like any other key, but contains a VGA resolution video and stills camcorder with audio capture. The battery lasts for 1 hour and it supports microSD cards up to 16GB (around 5 hours footage). Very clever, very expensive, but ultra useful on the right keychain at the right time. £346.63.
This item is so clever that it will vibrate to indicate that it is shooting pictures, once for stills and twice for video. It can also be set in standby mode so that it will only start recording video and audio once it detects either movement or sound. Recordings can be stored and viewed on your computer via the USB connector supplied with the system. Recordings are also time and date stamped.