There used to be a series of HP thin clients, numbered like T5500 and similar. Those are in fact small PCs, with Ethernet, VGA, four USBs, one PS/2 and even serial & parallel ports(!), powered by either VIA or Transmeta CPUs (clocked at 700...1000MHz), with built-in PATA flash drive around 256MB and about as much of RAM. They run completely quiet and quite cool. They are of size of average router.
They are dirt cheap those days. -- Mateusz Jan Przybylski ``One can't proceed from the informal to the formal by formal means.''