sweeet! This was actually used in some Lighting Challenge on 3Drender.com! Offline renders of course. Really cool to see it in real-time. http://www.3drender.com/challenges/
Here are few places for a good written tutorials 3d total: http://www.3dtotal.com/tutorials/ cg arena: http://www.cgarena.com/freestuff/tutorials/tutorials.html