What Andy basically said is that they do have some plans for "larger scale architectural projects", but there isn't anything specific to mention or when we might see such changes. Some of these larger projects for the proprietary NVIDIA driver include improving video memory usage, rendering synchronization, and improving the window system interacitvity. Though due to the size of the NVIDIA Linux team, they are uncertain when such advancements may arrive.
While the NVIDIA Linux team isn't too huge (though certainly trumps the community Nouveau driver team), they are looking to expand. Andy mentioned they are looking for experienced Linux software engineers. For anyone looking for employment within a Linux software development field (though not necessarily open-source) and would like to work on "NVIDIA's Linux software", they are hiring. Those interested can contact Andy Ritger for details (for those that can't find his contact information, contact me and I can provide the information).
Aside from that, Andy also said they still have nothing new on the GeForce 400/500 "Fermi" series front in terms of when it may provide GeForce GTX 400/500 overclocking support on Linux.