Resources for CUDA

Below are some links that may be useful...
Nvidia's front CUDA page. Contains links to the software, documentation and forums.
A front page to a programming course based on CUDA taught at the University of Illinois at Urbana-Champaign, USA. The powerpoint lectures are very helpful and give some more "low-level" details on the hardware than the official documentation.
Contains PDFs of presentations given at a workshop. Of particular interest is the one on optimization.
Cubin Utilities, by Wladimir J. van der Laan
Contains the very useful "decuda" cubin disassembler, helpful for optimizing code by allowing you to see what the hardware is actually doing.