Nvidia has made new Beta drivers available for FreeBSD AMD64:

“I am pleased to announce the release of updated NVIDIA FreeBSD beta graphics drivers that take advantage of kernel features (feature requests) added in FreeBSD 7.3 and 8.0 that enable improved NVIDIA graphics driver support for FreeBSD/i386 and initial support for FreeBSD/amd64.

FreeBSD-specific changes since 195.22:

  • fixed a bug that could result in crashes, such as kernel panics, after shutting down X on recent NVIDIA GPUs.
  • updated state tracking in the kernel-interface files (improves e.g. event delivery, see the NVIDIA feature requests link above).
  • made miscellaneous improvements (dropped GIANT dependency, etc.)

Read the full announcement and installation instructions: New Nvidia AMD64 Beta drivers

Thanks, Dave, for dropping me a note advising of the new release.