Well after working on Yummy some more, I decided I wanted to have a thumb nail of each PDF that is in the Yummy index. So I finally figured out how to do it, and its pretty slick, if I do say so myself. I will be releasing a web service that will let you pass a URL to a PDF, and Yummy will return a URL of the thumb nail. Its not super fast considering the server has to download the entire PDF, and then generate the thumb nail. but its acceptable.