[ Apologies for cross-posting ] LibraryThing just released a free, CC-attribution-licensed Web Services XML API to our "Common Knowledge" system, including series data, fictional characters, author dates and much else. I'm particularly stoked about the series data. I think it's of exceptional quality, suitable for use in OPACs (eg., http://www.librarything.com/series/Star+Wars). Anyway, in a catalog or not, there are a lot of cool things to do with it. Have fun! http://www.librarything.com/blog/2008/08/free-web-services-api-to-common.php Tim -- Check out my library at http://www.librarything.com/profile/timspalding