I believe that is about it! At this point you should have a fully functioning
OpenGL system for running and developing OpenGL apps.
You can try building the demos in
/usr/src/Mesa-4.0.1/{demos,xdemos} by using the
Makefile.X11 as Makefile
and running "make targets" or "make teapot"
etc. They should build and link with the hardware accelerated libGL and run very fast!
Qt has a OpenGL example in $QTDIR/examples/gear,
that you should be able to run as simply as "make;./gear".
Just about any standard GL/GLX/GLU/glut app should run fine, such as WolfGL, GLQuake,
glqwcl.glx (GLQuakeWorld), quake2,
and of course ... quake3!!!
HAVE FUN!