There's another Fermi card in the works, and it educated guesses say that it'll be the GeForce GTX 460. Leaks from Chinese and German websites give us a picture of what we can expect from the upcoming offering from Nvidia.
First up, Heise (translated) cites a trusted source in providing the following spec chart.
Heise notes that test cards have been clocked up to 830 MHz without any change in voltage while maintaining stability. If the overclocking potential is indeed true, these cards could be a good value, as Heise places prices at $250 for the 1GB model and $230 for the 768MB model.
Chinese site Expreview then grabbed these card shots: