Wanna trade in some battery life and get a bit of extra speed in the deal? Lenovo is now offering its spanking new S12 netbook with a VIA Nano ULV 2250 processor and VIA Chrome9 HC3 graphics instead of the usual Intel Atom / GMA 950 combo, which should offer a little more pep (at least in some applications) and lops $50 off the original's spendy $500 asking price. The Nano setup will draw more bat