any suggestions?

There is one at opengl.org. You might not dislike it.

P.S. 24 posts: wooohooo!

This is for version 1.1; the print version is current at 1.2.

http://fly.cc.fer.hr/~unreal/theredbook/

(aka the OpenGL Programming Guide)

http://nehe.gamedev.net

(Jeff Molofee's OpenGL tutorials)

..

Brent

The MacGameWiki has a couple of links:

http://www.crissman.net/macgamewiki/index.php/OpenGL

what, no 'Inside OpenGL' equivalent?

The Red Book and the Blue Book together are much better than Inside Macintosh ever was

The Red Book introduces you to the concepts in some sort of sensible order, and explains them in easy-to-understand terms. It also provides a fairly complete API reference.

The Blue Book (replicated in the OpenGL man pages) is the complete API reference, detailing every parameter to every function.

You now have links to online versions of both of these documents.

if you just want something like ThinkRef, you might like:
GLRef

content taken from various sources. I just noticed that it's missing GLU however.