I was looking though this today and found it interesting that there was no link to a screenshot. Found it though:
Might be nice to have that in the Readme
While the flutie default styles are relatively stable, I'd rather not have to update the screenshot every time we make a change to the styles. (I also don't want to have an out-of-date sample image.) It's also very easy to run the server inside Flutie to show the styleguide page.