librarything

Now that I found a nice home for my music habbits, next thing on my list is my collection of books.
While searching for a last.fm for books I stumbled upon www.librarything.com, which I will give a try.
The fact that they intend to charge money for this service may be a drawback, but the initial 200 books you can load for free should give you a headstart with a modest collection like mine.

update: et voila! Here is my profile and here my catalogue (at least the first 67 ones, the rest will require some manual entry)