Has anyone heard of Russel Stutler and his amazing waterbrush drawings?

oh yes, they're amazing

Does anybody here do waterbrush, I really want to start.

Its like normal watercolor painting, only with your water supply inside the barrel of your brush. Its pretty usefull if you're painting somewhere where you got limited space for your art supplies. On the other hand, waterbrushes can't give you the performance a quality watercolor brush does, and its often hard to control the water flow.
I prefer using a traditional brush for watercolor but choose waterbrushes for working with watersoluble pencils or turning an ink line into a wash.

Hope I helped you. Take a look at Russ' forum if you don't already have, many people there use these brushes.

Cool, thanks!