Yes, there's a new 7800GTX that has dual GPUs on it. I'll link you to it!
This is interesting because it's not Dual Memory that makes it have 512MB total, but it's dual GPUs. Very interesting!
As soon as everything is incorporated to have Dual-Cores and utilize them effectivly, I think that's when games will really start to shine. Sure FEAR and Far Cry are amazing, but imagine that but with dual GPUs, or better yet, Quad GPUs, which actually is possible as of now if you get that dual GPU and use it in SLI! I wonder what it would be liek to have Quad SLI with 16 cores!!!
Can you imagine the new Quad SLI with 4 of these dual core GPUs? Man, that's power!