ARB V/F Shaders Easy Tutorial

Im looking for an easy tutorial into arb vertex and fragment shaders.

http://oss.sgi.com/projects/ogl-sample/registry/ARB/fragment_shader.txt

http://oss.sgi.com/projects/ogl-sample/registry/ARB/vertex_shader.txt

Do you know if there is an easier tutorial about this stuff on the internet ?