When are these going to be available?

I am going to be buying a new gaming rig soon and I just want to make sure I dont buy something that is outdated next month. I almost bought a 8800GTX since I saw that it was the best for some time but isnt it time for the 9900 series to be coming out soon?

If the 9900 series is about to open up I will wait for that to happen and I was also wondering about the "true quadcores" I kept hearing they are coming soon but I never got a date on when that would happen.

Sept 10th for Barcelona, native quadcore, probably Oct for Phenom.
Nov for the G90/G91.