This may be useful for those of you who'd like to catalogue your trade paperbacks online, or maybe look at people with similar collections.
They allow up to 200 books with a free account. I couldn't stop there, though. I have maybe a third of my own personal library on there, and I haven't even gotten to the shelf that is filled with trade paperbacks. It's a bit addictive.
I might put a widget on the sidebar later, when I'm done with my entire collection or I just get bored enough not to enter any more.
(Found through Composite)