Here is a more accurate description of what the java desktop system is. It IS a Suse Linux distro that was tweaked and rebranded by Sun Microsystems. I love it. I love linux and I love java, so I thought why the hell not buy the Sun Java Desktop System. It also comes with star office 7. It runs a stock 2.4.19 Suse kernel and Gnome 2.2.
To answer your question the driver does work with the sun java desktop system. I just installed the beta nvidia driver today. The install is the same as a Suse 8.2 install. I installed it on an Area51m. My graphics card = Nvidia FX go5600. No problems here.