Rule #1 - Be Patient - Rule #2 - Don't ask when, if you don't contribute - Rule #3 - You have coding skills - LinuxMCE's small brother is available: http://www.agocontrol.com
Is support for nVidia VDPAU API scheduled for the next release of linuxMCE core functionality or is this up to the individual media players (v4l, totem,...)http://www.nvidia.com/object/linux_display_ia32_180.06.html
Of course there was also a similar announcement from AMD/ATI too ; http://www.phoronix.com/scan.php?page=article&item=amd_xvmc_xvba&num=1