Author Jennifer L. Armentrout just wrote one of the best articles in praise of book bloggers and their reviewing skills that I've ever read, and you can read it at her blog here.
Some of my favorite lines (these are Jennifer's words, not mine):
"Messing with a blogger's reviews is like throwing stones at someone's kid."
"The only time an author or a reviewer has a negative impact on an author, is when the author makes it into a negative thing."
Now go read the article right away!!!