nvidia dont mind their linux drivers being redistributed

"Alex was able to include the Nvidia drivers because of the "linux exception" in Nvidia's license.

"2.1.2 Linux Exception. Notwithstanding the foregoing terms of Section 2.1.1, SOFTWARE designed exclusively for use on the Linux operating system may be copied and redistributed, provided that the binary files thereof are not modified in any way (except for unzipping of compressed files)."

The nice thing about this is anyone can include them. The entire license is <a href ="http://nvidia.com/view.asp?IO=nv_swlicense"> here</a>"