9800GTX + X38 : supports CUDA?

I am about to buy a 9800GTX. Does it support CUDA yet?
I plan to use X38 chipset. WIll I able to use two CUDA GPUs on the board? And do both of need to be the same or can I use two different types of GPUs?

If a display driver is available that supports the GPU, then CUDA supports it. CUDA does not require that multiple GPUs be identical, although you might experience undesirable performance if they are not identical.