I’ve always wanted a place to archive, review and share the books that I read (hear).
So far as I can see, there are no excellent sites yet. The least bad seems to be Goodreads:
… a privately run “social cataloging” website started in December 2006 …
A July 2011 article in The Louisville Courier Journal noted that GoodReads had 5.2 million members. …
If you want to try it out, start at goodreads.com
tutorial – how it works. Or — if you prefer video tutorials — try this.
They have an iPad / iPhone app, too.
Rick McCharles 
I adore Goodreads. I only joined about a week or so ago but it’s fantastic. You can also get a Goodreads widget for your blog which is really cool! Happy reading!
LOVE IT.
I like. Works for me!