OK I got something working so far. Here's a quick outline of the steps if anyone else is interested:

1. Installed TurboVNC and VirtualGL on CentOS 5.6 http://www.virtualgl.org/Main/HomePage
2. Installed TurboVNC on OSX
3. Connect from Mac to Linux using TurboVNC as normal
4. Quick test using ...

Thought I would try the demo before purchasing and ran into some issues.

I have a hackintosh main workstation running Blender and GeForce8800, and a render machine running RHEL 5.6 and GTX560. I was thinking my workflow would be export OBJs from Blender on the Mac to a shared folder, pick those ...