It's always a great thing when people want to use illustration on their websites, rather than lame stock photographs. The good people at Storytrack were such clients, and they requested a few different illustrations to grace their homepage in a rotating format.
In addition to these, there were quite a few spot illustrations and custom lettered headings. You should check out their website to see more!
Hopefully more website owners will go the illustration route - it's definitely the right way to go (not that I'm biased or anything).