hey guys, just want to share my own experience on this.
I'm running Ubuntu Linux 10.04LTS 64 bits on a macbook pro with NVidia geforce 320M graphics. So same problem when trying to use opengl sketches. The solution I found was to download the jogl-1.1.1a-linux-amd64.zip package from the
old jogl website, and then replace the following library files:
libgluen-rt.so
libjogl.so
libjogl_awt.so
libjogl_cg.so
in <processing bin folder>/libraries/opengl/library with the ones provided in the zip. This solved the problem, everything that is opengl related seems to work fine, including Cg shaders. I should also note that I'm using the processing pre-release 190.