It looks the same, it works the same, and though it's three-tenths of a millimeter thicker than the original, Sprint's Nexus S 4G has one major difference: it sports a WiMAX radio. Today, the freshest Gingerbread smartphone goes on sale, just as planned, bringing the same 4-inch curved Super AMOLED screen, 1GHz Hummingbird chip and NFC capabilities your T-Mobile counterparts have enjoyed for months plus the promise of Google Talk video chat. Find it for $200 on-contract directly at Sprint, or shave $50 off the sticker price if you're a brand-new customer by trying Best Buy instead.