Volume 3 of the OpenGL has been released, read it here.
In this volume there is a lot of good stuff. There is more about the OpenGL process, information about OpenGL ES (the embedded platform), a look at the OpenGL SDK, and plenty more.
The OpenGL SDK has been released here. It is not an SDK in a traditional sense but a collection of third-party constributions. It contains documentation, libraries, tutorials, and tools.
