Beyond Goodreads: book-based social networking

It's been awhile since I last posted about my travails as an independent author, and one of the trickiest and most time consuming activities for any author is marketing. That's why I decided to write a short blurb on a few of the book related social networks I've come across since my books were published last year.

Currently, I know of three: Goodreads, Shelfari, and LibraryThing.

So here's what I think.

Goodreads 
What I like: free, easy to use, vibrant community of active members, meeting other authors, Read to Review programs, groups, message boards, free blog, author dashboard, html tips, ability to edit reviews and blogs you've written, ability to post reading status updates, talks to Facebook, ability to follow reviews, become a fan, block people from following you, friending

Am I addicted to it: yes

What I don't like: can't save a review in progress, have to finish in one sitting, book setup as an author is a pain in the behind (worth it, but painful), you have to upload your own picture of your cover or your book has the dreary generic look