Andres has a bunch of examples in the library.  That would be the place to start.  However, I'm wondering if he's going to continue GLGraphics.  He's loaded quite a bit of it into Processing 2.0 along with the move to JOGL 2.0, which supports OpenGL 3+ profiles.  They're also adding in new features for easily recording shapes with Processing syntax into a VBO, which will be extremely fast ( see the changes ).  So, something to consider.  They're at 2.0 Alpha 2 if you want to play with it.  Andres has also incorporated much of his GSVideo library into the 2.0 core as well.

Another alternative is to optimize your existing OpenGL code using pure OpenGL and a few GPU techniques, which can be significant. Using a VBO, Display List, or a Vertex Buffer can be orders of magnitude faster.