Modern OpenGL presentation by Mark Kilgard (NVISION 08)

NVIDIA has posted some OpenGL-related presentations from their recent NVISION 08 conference. I found the one on the GeForce 8 features and Cg particularly good with respect to introducing some modern OpenGL functionality and giving a sense of direction for the API.

http://developer.nvidia.com/object/nvision08-opengl2.html

Also check out the NVSG presentation with has some OpenGL related content.

http://developer.nvidia.com/object/nvision08-NVSG.html