I signed up for six months of the Watercolor Workshops at ArtistNetwork.tv and I am really enjoying it. This exercise is from Chinese Watercolor Techniques with Lian Quan Zhen.
He has two other videos on the network which are very good. Jean Haines studied Chinese Brush Painting and you can really see how it has influenced her watercolor style when you view Lian Quan Zhen's videos.
Monsieur Sketchbook, Kuretake Waterbrush filled with Sumi ink.