Just spotted this @ Guru3D.

Good news for all you folks who have been waiting for an update from Nvidia of the Stereo Control Panel for 3D glasses like the Elsa 3D Relevator, ASUS VR100 or even anaglyphic (e.g. red/blue) glasses. We got our paws on a beta Stereo driver for the 40.xx detonator drivers.

Download NVIDIA 40.xx Stereo Control Panel