I had to read this twice when I saw it the first time. nVidia recently announced plans to release new versions of their ForceWare driver packages on a monthly basis instead of the current random releases few people notice unless they check their web site frequently. Here's the schedule they've announced:

February 2007::
Achieve WHQL certification on Windows Vista. This is less important to consumers, unless you're upgrading to 64bit Vista, but it's a huge step forward for nVidia in the battle for supremacy with ATI (now AMD).

March 2007:
GeForce 7-series will be getting full SLI support. Also, TV output should be seeing an upgrade to HDTV including overscan correction.

April 2007:
DirectX 10 SLI support on Windows Vista and H.264 decoding acceleration for the few who have upgraded fo HD-DVD or BluRay. Also, additional support for mobile video cards.

A fully detailed article on this announcement can be found on PC Perspective:
PC Perspective: NVIDIA Vista Drivers Update: Future Plans Unveiled