I've signed for facebook for a long time, but never use it. When I began posting my stuff and searching my friends on face book last week, I found it is so interesting that I even found a friend that we didn't communicate with each other for more than 3 years. I could see her current pictures and her new baby, it's so excited that I can't help posting a comment for her. The face book make the world smaller and we can see each other even we have the different time zone.
I think the facebook can used as a review and comment centre for the reader and the staff. It's a place that you share your opinion on the books or you could recommend you favorite book for everyone on the facebook. It's easy to use but just different tabs looks a little cofusing if you don't get into it. I will keep posting my opinion and pictures on the facebook. But I haven't heard any customers asking for our facebook. We may need to promote it to the customer when they do the register. I think they will like it if they are the book and author fans.