Over the weekend, Nvidia moved their 163.71 drivers into WHQL and now has them available for download
. The drivers are definitely worth the download if you are playing newer games, such as BioShock or the Hellgate: London beta.
These drivers aren't incredibly new, having been available for a bit over a week as a non-WHQL package, but if you are still using an older series now's the time to update. They fixed a few SLI bugs with this release, such as the 7300 and 7600 series not functioning in SLI mode on Windows XP.