For me Nvidia died with the day when AMD bought ATI. The opensource strategy was then only a matter of time and it happend fast.
To tell nouvou would be great and not giving the developers any documentation is marketing bullshit, the block it as much as they can, the only way to be more incooperative would be to sue them, but 1. they likely would not win 2. the marketing damage would be extremly big. I hope nobody develops any big stuff for nouvou. Good opensource support for Nvidia hardware with massive effort of reverse-engineering would be silly, because you take pressure from the company. And with the same or less work you could make the amd drivers with the docs to an excellent driver with good 3d speed (the other stuff works since a few weeks nearly perfekt anyway, except VDPAU like stuff)
Nvidia have hard work to do to not die in next few years. They are heavily under attack with better and cheaper grafics-cards from Amd. If cuda dont succeed (and it wonīt) and they get no big foot into gp-prozessing they will at least shrink massivly or go bankrupt.
And in this situation could be a missing opensource support and with it some lost sells be the waterdrop that brings the burrel to overflow or fasten den process (donīt know if that adage is common internatioly itīs a german saying )
Nvidia isnīt in a strong position anymore, letīs ignore them (donīt upgrade the nouvou) the opensource community have the stronger position so just wait till they release docs/source or till they die.