Shelfari is awesome!  It's a visual database for cataloguing your book collection.  It's a bit of work, but it's the stuff you can do once you set it up that's awesome. It d-bases

• your collection
• comments
• reviews
• ratings
• common interest groups
• members who are reading the same books you are
• members who have the same books you do
• shopping links
• personalizations such as how many times you've read a book

You can invite friends to see your shelves:

• Favorites
• Have read
• Plan to read
• Wish list
• etc.

You can also make recommendations to other members. 

I love how they have cute little graphics to annotate your books with. There's one for favorites -- a heart.  A gift-wrapped box for wish list books.  A dialogue balloon for reviewed books.  There's even a collective d-base where you can copy books to your own shelf. It really saves you a lot of work, let me tell you. And it's free. Free.  You even get to name your shelf page.  I am trying to decide between LADYOFLETTERS, PAGETURNER, WORDWINGER. But I'm also trying to come up with some others because once it's set, that's it. So it needs to be interesting -- and literary.

I'm giving SHELFARI 2 big thumbs up. Y'know, not for nuttin', but I think I may have found something to lure me away from Amazon.com.