Best GLSL resources?

Let me know the best resources, I really want to get environment cube mapping working, the Orange Book led me to a dead end (reflection doesn’t change with camera rotation). There are many other effects that I’d like to do too. Does anybody here do tutorials?

BTW, I have scoured the internet, but maybe I didn’t find the right places. The Orange book covers a lot of effects well, and so do some sites, but there are some which get no love, especially when it comes to good application code

http://www.ozone3d.net/tutorials/glsl_texturing.php

I used ozone3d to get per-pixel fogging, multi-texturing, and spherical environment mapping. I could not get cube environment mapping to work though