German RepRap just released their stand-alone 3d print server control unit. It can be used from web interface from any computer or smartphone, it connects to the internet via WiFi or LAN cable and with three USB ports to the controlled 3d printer. Web camera monitoring is also available via USB ports.
It is priced at 149 euro.
Is it too much? Maybe ... you can make something similar with Raspberry Pi and other similar devices from less money. I would like to see more test to see if there are any advantages like in stability, processing or reliability.