I've got a first prototype up. Keep in mind I've only spent about half an hour on this so far, but I wanted to get something out so that it's not pure vapour. I don't have a lot of bandwidth on this host, so please don't do anything like trying to index/crawl the site. The code and database are available for anyone who'd like to see it. http://www.joeysmith.com:8080/ Some things I should point out: 1) The database model isn't where I want it yet. It only supports the parent/child level of tag nesting. 2) I only seeded it with 1000 books to start. 3) I seeded the tag list with just some VERY basic tags initially. special/untagged - All books have this tag special/none - This is a placeholder. It will probably not be in future releases. special/all - Also a placeholder. language/ - This is a list of all the languages we have books for. 4) This is still in the beginning stages, so the add and remove tag links do not yet work.