More clarification on this from nvidia would be helpful (eg are they open to bug reports for problems with consumer boards?).
Alan said on his blog that he got the drivers to work with his consumer board (GeForce 4 4400 Go) but that he had to do a little fiddling to get it to work. I'm going to wait for his tips before trying the drivers with my GeForce FX 5900.
Alan's blog: http://blogs.sun.com/roller/page/tpe...le_for_solaris