Probably everyone knows about this, but I thought I would do a quick post about it anyway...
Fyrefly created a google search engine that specifically searches book blogs. It's a great way to find what other people are saying about a book.
You can find the engine here.
You can make sure your book blog is included in the search by checking Fyrefly's list here. If it's not, be sure to let her know so she can add you.
And finally, you really ought to stop by Fyrefly's blog and thank her for her hard work!