If you are looking for great book reviews, check out http://www.rebeccasreads.com/.
At one time, this was THE place to go for reviews. Due to a variety of personal reasons, the site went into hibernation.
With the help of a group of reviewers (including yours truly), the site has been revamped and reopened. It has a great new look and there are already many reviews being uploaded.
So, stop by and take a look around.