8800GTX on top
9800GTX bottom
Wouldnt get so hyper over this 'new' series. The 9800GTX is identical to the 8800GTS with the exception of a slight overclock, and an additional SLI connector.
If you have an 8 series card already it is kind of pointless to upgrade unless you are going for the 9800GX2 which in it's self is just two 8800GTS's.
What anoys me right now about this is nvidia actually have another card ready, G100/200, and they will not release it untill ATI come in with there R700. So basically, the proper next generation card is ready to go, pretty much now, but they arent going to release it till they see what ATI will do.
Martyn