Who is using which? How do they compare? Does anyone use more that one? I've started using LT which I really like. Then found Goodreads and I've found the other participants are more active in GR than LT. AND then I found Shelfari and I really like their cool bookshelf for the widget but there's a lot of advertising. I really have attempted to analyze any but if you have strong pros or cons about any of these or know of others, please share.
I've actually tried all 3. l like Shelfari and goodreads better than library thing. Goodreads has some nice options for authors and shelfari is very easy to navigate and add books.
I am beyond addicted to goodreads. I've made some great friends on it who have turned me on to books I would never have picked up otherwise. :-) And really, isn't that what it's all about, finding great new books to read :-)