I'm calling this one done. I wasn't digging the original color scheme, but I think it all came together when I decided to use green as my focal color. The hair was particularly fun to paint, and probably took nearly as long as the entire rest of the image. Her hair is actually more brown, but I darkened it here in order to blend in better with the background.
NEW! I just heard a very cool development. This caricature won the weekly MYFX challenge over on the forums for one of my very favorite magazines ImagineFX. There were a bunch of great entries so I'm flattered that I won the most votes. Thanks to everyone who voted for me.