I'm one of the developers of CUDA at NVIDIA, so if anyone has any questions about that or GPUs in general that they'd like answered, feel free to post it here and I'll do my best.
However, answers might be a bit delayed--I'm at SC10 this week (or if you're at SC10, I'm an easy person to find at the NVIDIA booth).
I'll come visit you! I've been learning OpenCL and it would be interesting to get your opinions on it as a CUDA dev :)
I know from my professor that CUDA is much nicer to work with since its more mature, but I'm interested in OpenCL's future, especially when it might get some of the nice features CUDA has!
However, answers might be a bit delayed--I'm at SC10 this week (or if you're at SC10, I'm an easy person to find at the NVIDIA booth).