Yesterday I came across a number of websites and blogs reporting that NVIDIA had issued a recall for GeForce 8800GTX boards due to an incorrect resistor being fitted. It seems that these reports weren't accurate. There is no recall.
Here is an official statement I just received from NVIDIA:
Today NVIDIA announced the hard launch and immediate availability of our new flagship GeForce 8800 GPUs. Some recent reports on the web mention a BOM error (wrong resistor value) on initial GeForce 8800 GTX boards. All boards with this problem were purged from the production pipeline. Product on shelves is fully qualified and certified by NVIDIA and its board partners. We and our board partners stand behind these products and back them with our full warranty.