The prices for the upcoming Nvidia cards, GTX 480 and GTX 470, have apparently leaked.
GeForce GTX 480 : 512 SP, 384-bit, 295W TDP, US$499
GeForce GTX 470 : 448 SP, 320-bit, 225W TDP, US$349
GeForce GTX 470 : 448 SP, 320-bit, 225W TDP, US$349