Oh man... I've been experimenting with different ways to shade lately (which is my favorite part), and I have to say I'm a big fan of a top level for shading, then flattening everything and using dodge for highlights.
And... I finished! I have a bigger version... though I don't like it because the lines look odd.
http://tinypic.com/1jujyo
Edit: Picture now includes *FREE* belly button!
xd