It's not just me then...
I've had a Alienware laptop that has two SLI cards laptop running Vista for the last 11 months. Not only have Nvidia/Alienware been unable to produce a Vista Driver that has can use the SLI functionality, but the driver periodically crashes just as the desktop loads, and 100% crashes if you try and step down the power options.
I finally had enough few weeks back and started to look at how to slipstream raid drivers into an XP installation to dual boot the damn thing.