The web comic Skin Horse clearly takes initial inspiration, at least as far as its initial cast goes, from The Wizard of Oz. There's a scarecrow, a tin man, a little dog, and, um, a dorothy of sorts. And the first storyline involves a cowardly lion.
(This thought isn't just mine — the "Cowardly Lion" reference is overt, and there are some others mentioned on TV Tropes. I'm curious how deep it goes, though.)
I'm not really familiar with the Oz universe and books, beyond the pop-culture absorption of the movie that I can't help but having. Are further storylines in this comic also Oz-inspired, or are there at least further Oz references? Or does it really just diverge from there?