Quote from BBC

VIA Technologies, responsible for the Mini-ITX motherboard, which is only 17cm x 17cm, are about to launch the Nano-ITX. This one is only 12cm x 12cm in size and has a 1GHz processor built-in.

Along with built-in Ethernet networking, USB and TV-out, it is sure to be a hit with those wishing to downsize their systems. It also has hardware Mpeg-2 and Mpeg-4 decoding with 3D graphics support.