The Official OpenGL site has put online the ARB notes of the last 3 quarters of 2004, outlining the roadmap for OpenGL 2.x. Some of the topics discussed:
- OpenGL Roadmap
- OpenGL 2.X conformance tests
- OpenGL 2.1 proposed features (superbuffers, pixel buffer objects, compiled shaders, timing/async extensions, etc)
- rendering without a window system and floating point buffer extensions.