My name is Mark Burgess and I work as a freelance illustrator - as well as a few other things ;). I have really enjoyed testing out the ZBrush 3 beta. I find the new subtools feature particularly useful. For example, it is great for adding clothes to a model. I really like the flexibility of working that this feature brings.
The new materials and MatCap tool are also great for illustration work. The quality of real-time [Preview] renders in ZBrush3 is simply amazing.