(Thanks to Size Doesn’t Matter) The 2x2x2 inch CuBox-i from Nazareth-based SolidRun has no moving parts. You need a separate monitor (or TV screen) and power adaptor, but you have probably got these already. From $45 to $119. Deliveries begin in November.
http://www.gizmag.com/cubox-i-mini-computer/29164/