Hi,
nVidia have released a special page for it's Graphic cards that Vista can utilize.
Drives the Windows Vista Aero user interface
Second processor for the PC dedicated to graphics, offloading the work from the CPU for better performance in multimedia-rich environments
Increased Productivity
Faster desktop response time and efficient multi-tasking
Instant access to multiple open windows
Support for multiple monitors
Crisp, Vibrant Photos
Unprecedented color clarity with NVIDIA Digital Vibrance Control?
Photo viewing and management in high-fidelity resolutions
Smooth, High-Definition Videos
Ultra-smooth HD DVD and Blu-ray? Disc playback with NVIDIA PureVideo? HD technology
Easy output to your TV or HDTV
Ultra-realistic Games
Accelerates the latest standards in 3D
Unparalleled performance
Stability, reliability and compatibility
They also have a demo of the what their graphic cards in action with Vista.
Low Quality Video Demo - 64MB
High Quality Video Demo - 190MB