Here are some links I found on the web:
- Book Collector - which downloads information about a book if you type in the ISBN, title, or author, and then maintains your collection. http://www.collectorz.com/book/
- This is another package that includes a scanner - seems like a great deal. http://www.neuton.net/products/index.cgi?command=mi&id=27&ccat=3
- If you are feeling more adventurous, and want to set up a free solution, with a database and web server, try this - http://www.phpmylibrary.org/
Let me know what you find.