Yup, I agree with dreams - Smashwords is worth checking out
Originally Posted by dreams
(Smashwords distributes Premium Catalog ebooks to major online retailers. The first outlets to receive the Smashwords Premium Catalog are Barnes & Noble, Sony and Kobo. Apple is immindent. Amazon is forthcoming.)
So far, Smashwords has ironed out bugs and made the vast majority of its premium catalog available through B&N and Apple. Sony and Kobo seem to be having some teething problems, and Amazon has some additional formatting requirements, I think.