This is beyond cool
LibraryThing, a very simple way to catalog your books online. I've been needing to do this for ages, but being the perfectionist that I am, since I couldn't decide what would be the best way to go about doing, I never even began. The first 200 books are free, after that there's a one-time $10 fee that allows you to list as many as you like.

Found at Emeth's blog.

Update - I don't know if this will work, but here's a link to my library.