Don't remember/know what's been posted here and the rest 40 threads about the same thing ( not funny ), here's some things that I've heard from a contact in a VGA manufacturer:

-nVIDIA GeForce 8800GT: Release Date, 29 Oct 2007
512MB, 256BIT, 600MHz Core Clock
-ATi HD2950Pro & HD2950XT will be ready & launched in mid November

That's the "best" of what this contact could give me at the moment...gotta check another contact later on though for some real juice.