ASUS has fleshed out the details of its designer U series notebooks. Ostensibly based on the shape of a butterfly, the systems share the same tapered shape of the MacBook Air and are also faster, larger versions of the Eee PC 1008HA. The 12-inch U20A, 13.3-inch UX30 and 15.6-inch UX50V are all based on the basic processors expected to be part of Intel's Consumer Ultra Low Voltage (CULV) effort a