Nvidia has pushed an OpenGL 4.1 driver out the door for testing. Granted I'm unable to actually test this I don't have any Fermi based cards on hand
Now, I'll admit that I'm not exactly Nvidia's biggest fan. I consider the GTX 470 to be overpriced, too hot, and too power hungry. I'm not even sure the 850 watt power supplies I picked up some time ago could handle 3 470's in Triple SLI. I have an even lower opinion of the GTX 480. Yes, the GTX 480 is more powerful than a stock RadeonHD 5870, but if you check the links that I'm putting in here, it's not near as makes no difference $100 more powerful.
Anyways, since I don't have a Fermi card on hand to test with, I can't really give any feedback on how well this driver works. For this then, I'll just have to rely on readers who bought Fermi cards to download and test the driver.