hi jugend,
come to think of it, the first "extension" I had in mind - audiobooks - perhaps isn't such an extension after all and keeps within your focus on books.
amazon is already feeding up audiobook titles through bookjetty, but what I'd love to see is audible.com as another search source (since amazon and audible are my two main sources for purchasing books in print or audio).
what do you think?
NB: they also have an affiliate program like amazon. Its more tightly restricted, but I am sure bookjetty would qualify
NB2: I am also thinking of a famous series of podcasts that are sponsored by audible - I'm sure you know which I mean. As it is, bookjetty is well worthy of a mention/review on, say, net@nite. Now if you had audible support I'm sure they would just gush! For consideration ... if you want to push for more users right now;-)