Remember the Jack PC? Hello, competition! It’s pretty amazing, really — the device pictured here is a full fledged headless PC, capable of handling pretty much every basic task that even a modern day netbook could. Designed and sold by Marvell, the Plug Computer (or the SheevePlug, officially) is a self-contained computer that simply plugs into an AC outlet.The entire computer looks like an average wall-wart, with a 1.2GHz processor, 512MB of flash storage, 512MB of DDR2 RAM, USB 2.0 and Gigabit Ethernet. As