Sorry this took so long to get back, but I did actually test what happens with Optimus laptops and Linux. Even using an older 9.04 installation of Ubuntu, everything works as expected... which is to say, you can run Linux but you won't get the Optimus GPU. Since there's no direct connection of any display to the GPU, Optimus is required to move rendered content from the G210M to the GMA 4500MHD display buffer. As noted above, NVIDIA is currently focusing their efforts on making Optimus work on Windows 7; it's possible they will move to other OSes down the road, but they are not committed to doing so. If you want to run Linux and you want to use a discrete GPU, Optimus Technology won't work. Perhaps some skilled Linux community folks can figure out a way to do Optimus-like technology on their own, but given the level of detail required to interface with the GPU and IGP we see that as unlikely.
