Newegg.com has finally started listing Nvidia's GTX 570 cards from various partners and it looks like that the price should be set at US $349.99. This is much lower than expected as the UK price tag was set at £299 (GBP).
Newegg.com currently lists three cards and two, PNY and Palit, are priced at US $349.99. The EVGA card is priced at US$359.99. This puts these cards in direct competition to the HD 5870, at least price-wise.