While Xi3's Piston may only be a Steambox through its software optimization, that still leaves us with a milestone on our hands now that the system is available for pre-orders: it's the first Valve-blessed PC on sale. If you're willing to set aside just under $1,000 ($900 during SXSW), you can claim a Big Picture-friendly mini PC with an embedded, 3.2GHz version of AMD's quad-core A10 in addition to 8GB of RAM and a 128GB so
