I think the release is going to be in the first q of 2008 but if they'll surprise it might be in nov or dec like it written in the link , anyway they won't surprise me.
and about the prices I've heard that gtx will cost -549$-649$ and -399$-449$ for gts.
And one major thing is that one 9800gtx can beat 8800ULTRAx2 lol Rulz it's gonna be better deal to w8 and buy a 9800gtx in that cost instead of 2 ultra twice and more of the 9800gtx's price "Every delay for goodness"