Congratulations (and thanks). This is a huge step and should not go unnoticed.

Additional info for r600g: The env var R600_GLSL130=1 enables GLSL 1.3. Along with R600_STREAMOUT=1, it enables full GL 3.
Code:
OpenGL renderer string: Gallium 0.4 on AMD RV710
OpenGL version string: 3.0 Mesa 8.0-devel (git-10c8552)
OpenGL shading language version string: 1.30