I got mine from Debian's repository until they stopped updating them... I don't know if they plan on supporting future NVidia releases, but it's been a month since I upgraded from version 173 (Debian) to 185 (NVidia), and the new drivers, which have been out for quite a while now, make a huge difference. I'm disappointed Debian hasn't been quicker about updating them. Their reluctance to update also meant I couldn't upgrade from Linux 2.6.26 to 2.6.30, which also meant I couldn't use ext4. Now, on a point somewhat orthogonal to the original topic, I'm using ext4 and GRUB 2, and I absolutely love it.