Librarians, please go make your own library lookup bookmarklet for your patrons and install it on all of your public access machines. Make it available on your web site. If patrons are smart enough to be using Amazon to look up books, they should also be able to use this bookmarklet. I'm going to try to figure out how to add this functionality to my booklist, now that I have made ISBNs a field in my database [and just added a "buy this at Powell's" link]