"We're launching a set of free tools that allow retailers, publishers, and anyone with a web site to embed books from the Google Book Search index. We are also providing new ways for these sites to display full-text search results from Book Search, and even integrate with social features such as ratings, reviews, and readers' book collections. By providing tools that help sites connect readers with books in new and interesting ways, we hope publishers and authors will find even wider audiences for their works."

http://booksearch.blogspot.com/2008/09/book-search-everywhere-with-new.html

This looks pretty cool. I might test this out with my genealogy site and have previews of books my ancestors are listed in.

One thing I noticed, was the Books-a-million website gave me an invalid argument Javascript error when trying to use the Google Preview button on their site. It stopped any chance of me viewing the previews using IE 6 on Windows XP.