In January, Nvidia should have the final samples and a limited number of Fermi Geforce GT300 chips, but the launch might take place later.

If pushed, Nvidia might launch Fermi Geforce in late January as the final chips should be there by then, but real volume shipments should start towards end of Q1 2010.

The most realistic availability date is March 2010, and again only if everything goes right. Judging by our previous information, Nvidia delayed its plans by more than one, if not two quarters. 

This is rather unpleasant for Nvidia and the only thing that really keeps Nvidia sane is the fact that ATI also suffers from massive shortages of its 40nm RV870 based chips.