Ok, the usual problem is first that the build system doesn't work with i965g alone, you also have to build swrast (gallium) for the build system to not choke on osmesa.
glxgears works without issues. The HUD is not yet merged into this branch it seems.
OpenGL vendor string: We Love Gallium3D
OpenGL renderer string: Gallium 0.4 on Intel(R) Ivybridge Mobile
OpenGL version string: 2.1 Mesa 9.2.0 (git-10004a0)
OpenGL shading language version string: 1.30
http://get.webgl.org in chrome dev works, but 100.000 stars hangs the gpu.
kwin seems to work fine, very performant even.