Real Time Bump Texture Painting in Blender

I was going to create my first videotutorial on making-real time bump maps via texture painting on GLSL view mode. However, I found out that this guy, David Hickson, had already done it. So, anyway, it's a great technique, very useful to add detail intuitively where there's not enough geometry, as a way to keep the poly count down. It's also a great alternative to using a Multiresolution modifier, although I like to combine it with some basic sculpting. I really recommend it. I've been using it on this model I've been working on for Tube. Here is the link to the tutorial. Thank you David!