I have just read ARB_fragment_program specification and I have noticed that author using GLslang samples - where can I find some usefull info about GLSlang (compilers, tutorials, examples)?? I alredy have glslang specificatoion!
Have you tried 3dlabs site? They have quite a few gl2 stuff in there. I think their P10 card supports some of gl2/glslang if I’m not mistaken. Also, are you sure you haven’t seen CG examples instead of glslang ones? I think CG outputs to arb_fragment_program if I’m not mistaken and you might have seen CG used instead. Just asking.
If you want a tutorial, try “The Cg Tutorial” (ISBN 0321194969) published by Addison-Wesley. I am a co-author for the book. The book comes with a CD-ROM with example code but there are plenty of examples on the site above.