Nvidia decided to cancel its NV48 project, and it seems likely that these cards will not appear at all. Originally expected in Q1 2005, the cards have been dropped after Nvidia realised that it was a waste of time to push a 20 to 30 MHz faster card. ATI however will release updates of its R420 core that are only a tad bit faster, and would be a complete waste of money if you already have an R420.