I found this fascinating quote today:
With the half of Blogging For A Cause timeline over and we’re really starting to see the power of bloggers promoting their causes. With over fifty charities getting votes and more than hundred bloggers participating and spreading the word. Each blog post carries more awarnes for that cause with it and we can see from the comments of their readers as they get educated on the issues.Jure, under, Z-Blog, May 2009
You should read the whole article.