Amazon.com offers a new feature, "Search Inside the Book," a full-text keyword search of "more than 122,000 books." The problem is that this function is "integrated into our standard search," but I can think of cases in which one would prefer to search only the bibliographic record--e.g. in searching for books by a particular famous author, it seems that now one will have to sift through books in which the author is merely referred to, however tangentially. But I haven't taken the time to play with it yet. Probably the search engine ranks items with the search term in the record higher than those in which the search term only appears in the text.