As Leadwerks said CUDA is in kind of a Beta stage but i'm quite confident that we'll see some nice stuff with the GT200 beeing released later this year. But beside of this if you're going after it what do you do on ATI/Intel cards then? What do you do on weaker cards generally? Due to these limitations and that it isn't proofen technology yet, i wouldn't invest my time into it at this point and come back later when it is.