Again, this is _not_ possible because of intellectual property, by nvidia and, what is more important, probably by third parties, which would have to agree to a full opening as well. Guess why ati didn't open their driver either, but started a new, open one from scratch.
That's why I mentioned the option to open up some
parts of the code only.
(Actually Nvidia could dispose about it's own IPR stuff and open it.)
Of course, if the problems lie in the licensed part then this is no solution.
But the community could look at the opened parts at least. This could be a solution to the lack of manpower in finding problems.