XFree 4.0 and TNT2 video cards

[Peter S Galbraith <GalbraithP@dfo-mpo.gc.ca>]

After my upgrade to testing, I noticed that I'm still using
xserver-svga (3.3.6-31), so xinit start up saying:

 XFree86 Version 3.3.6 / X Window System
 Release Date: January 8 2000

http://www.xfree86.org/4.0.2/Status22.html#22 says:

4.0.2:

     Support (accelerated) for the Riva 128, 128ZX, TNT, TNT2
     (Ultra, Vanta, M64), GeForce (DDR, 256), GeForce2 (GTS,
     Ultra, MX), Quadro, and Quadro2 is provided by the "nv"
     driver.

So... how do I get the "nv" driver?

Thanks,
Peter