You can now download the NVIDIA GeForce 306.63 driver. This driver comes directly from NVIDIA's developer website. Windows driver version 306.63 and Linux drivers version 304.15.00.03 provide beta su... NVIDIA GeForce 306.63 Driver Download
After a half-hour of testing with these, the Arkham City benchmark, and the 306.23 drivers (and many comp restarts) i've decided to keep these dev ones, i liked the previous dev ones too. I'll keep the PhysX engine 0613 though, wonder why they've not started including it?