Nvidia has released a driver with RandR support (version 302, just this week).
It looks like this would probably show up first in the X Updates ppa.
How long does it typically take for a new upstream release to land in the X Updates PPA?
The newest drivers (including Nvidia 302.07) are available from the Xorg-edgers ppa.
Also read this please: What are PPAs and how do I use them?