The NVIDIA 260.19.29 driver adds support for new NVIDIA GPUs, fixes a bug that causes some OpenGL applications to become unresponsive, adds support for NVIDIA 3D Vision Pro, and adds a new 3D Vision Pro configuration file option to the xorg.conf.
Though in order to take advantage of NVIDIA 3D Vision Pro you need new hardware, including a new display or projector and proper 3D glasses. As such, the new 3D Vision Pro support won't find its way to be too commonly used on Linux, not to mention the current lack of games and such that would make this a worthwhile investment.
The new NVIDIA ASICs supported in this release are the GeForce GTX 460 SE, GeForce GTX 570, Quadrom 5000M, and the Quadro NVS 300.
Download links can be found in this forum thread.