Adam Jackson has announced the availability of "the zeroth release candidate(s) of the next Xorg release(s)." The changelog is here. Before downloading, be warned, in the developers' words: "The RC number is not accidental. This is unpolished and rough, and is only just at the point where we can usefully have large numbers of people testing it and fixing things." 
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Member since:Indeed, I was about to post about it, and then saw your comment.
The 3dnews page on that site has lots of interesting benchmarks too...
http://web.inter.nl.net/users/be-hold/BeOS/NVdriver/3dnews.html
As for the license, it's X11/MIT. All of Haiku is under the X11/MIT license (non-copyleft like new-BSDL).
So if this guy continues to make such amazing progress, then these drivers could indeed be ported to DRI for X.org ...
As matter fact that's the easy part. The hard part is getting the hardware lingo nailed, which once it's done will remain the same for any platform.
I wish this guy the best of luck, if he succeeds in getting some of the latter cards working, then we might finally have a good base to build off of in making future nVidia drivers. Since I would imagine it's easier to keep up with them when you already have an opensource driver implementation for one of their previous cards. As it is now all we've got are drivers for TNT.
Honestly, I wish I knew what kind of tools would make hardware reverse-engineering easier. Since it would be great to set up a fund to get this 'be-hold' dude anything he needs to get this all figured out. 
Member since:"I wish this guy the best of luck, if he succeeds in getting some of the latter cards working, then we might finally have a good base to build off of in making future nVidia drivers."
I really would like to wish the same luck, BUT I have to notice that he generally wrote it glazing at UTAH project or something like that, where was showed how to get cards up to geforce 2 hardware opengl, he could also get it in cards up to geforce 4 because such are only 'tuned' geforce 2 chipsets. Next cards are _too_ different to gf4, and without specifics Rudolf will propably never get them working in hardware opengl mode 
Sorry for my English
David
Member since:
Heya,
I don't know what the license is, but people working ont he haiku-project are developping/have opensource 3d-drivers for nvidiacards:
http://haikunews.org/1074
http://web.inter.nl.net/users/be-hold/BeOS/NVdriver/index.html
I just found it interesting to report ...
greetings,
Michel