Here is a sample movie of the spheres in cudart, the average fps code is not quite correct but gives a good idea of the current speed of the system. Well over 25 times the CPU implementation now.
Cudart Spheres movie
Here is the promised download - note it is only tested on a 8800GT with 512mb of memory. Any problems / comments / suggestions please let me know.
Again this one is only doing untextured spheres with 2 light sources.