I'm experiencing severe problems with ATI Stream SDK on Ubuntu. I've installed it many time, tried many instructions and as of now a large part of Stream SDK samples just don't work.
I suspect that nVidia proprietary drivers in Ubuntu Maverick are bundled with OpenCL support, unlike ATI drivers. Currently, installing ATI Stream SDK and getting it to work is a PITA sometimes. It should be easy for end users.
I hope that AMD will bundle OpenCL driver with all incoming Catalyst drivers.
What do you think?