I noticed a very interesting link here at the ogl website which features a lot of source from small games. http://igj.sourceforge.net/index.html
Unfortunately to get the source to the games and engine with which they have been build you have to go through CVS.
I could not manage to set it up on my IRIX box and at work there are firewalls which dont let me connect.
Does anyone have a .zip or .tar with the source of the main trunk i.e. The Engine.