These are the same drivers that were available as non-WHQL, so they aren't bringing any new features to the table. They do have 3-way SLI support and support for all the current GeForce cards including the newer 8800 GTS series.
They also have made a new driver package for Linux available for download. Unlike the Windows package this one adds quite a bit of new features. Rendering bugs of various sorts have been fixed, modesetting on the newest GeForce cards has been added, stability fixes and much more has been included. It's quite a laundry list of updates, but we've come to expect that from Nvidia – they have done extremely well in the Linux driver department.