Circuit City offers the factory-refurbished 2.5-lb. Acer Aspire One AO531H-1440 Intel Atom 1.6GHz 10.1" Widescreen Netbook in Diamond Black, model no. LU.S650B.320, for $289.99 with free shipping. That's $100 off and the lowest total price we've seen for a 10" netbook with built-in GSM mobile connectivity. Other features include an Intel Atom N270 1.6GHz processor, 8.9" 1024x600 widescreen LCD, 1GB RAM, 160GB hard drive, webcam, 802.11g wireless, flash card reader, three USB ports, 3-cell battery, and Windows XP Home. A 90-day Acer warranty applies.