Speaking of Keith, at the end of 2006 he said
Originally Posted by Keith
Dave Airlie has been copying this code into the nouveau driver and hooking up RandR 1.2 support there. That's great as it gives us a chance to make sure these new interfaces are right for more than one driver.
Over half a year has elapsed since. If you want something to test while nVidia does its thing, give the nouveau folks a hand as a tester.