Microsoft's omnidirectional RingCam
The RingCam is an omnidirectional camera, which captures 360-degrees of video. It is constructed of inexpensive 1394 digital cameras (each 640x480).
The RingCam differs from existing omnidirectional cameras, like the OmniCam, in that it is much higher resolution (3000x480), and significantly cheaper.
It requires a single 1394 cable to interface to a PC. Images from each camera are stitched together in real-time to form a high resolution panorama.
RingCam: An omnidirectional camera
A more recent version of the RingCam has an integrated microphone array in the base of the camera, and a privacy shutter (shown below).
Source Microsoft