Vanilla is a product of Lussumo:
Documentation and Support.
As a point of interest, what if Miller has put out this teaser in a very similar style to Sin City to remind people who's doing it? Remember, Miller's still rather new to doing movies, and he's used to comics, where a recognizable style can be seen as a great strength. From the poser, and even some of the images in the teaser, I think The Spirit will be a little more...visually textured, for lack of a better word, than Sin City was. More like a traditional movie than a moving comic book, which is what Sin City essentially was.
Before Miller was ever a director there was this interview on the original "Blade" DVD. He ended up talking about how Will Eisner is his favorite writer. They even showed panels from The Spirit. That means he truly loves the material and will treat it with some sort of respect. That gives me hope. Plus, I'm digging the actors he's working with.
Now I need to go read it for the first time...