Brett Love, at TV Squad, has published an article covering the renewal effort. Be sure to follow the link and leave a positive comment:
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http://www.tvsquad.com/2007/07/11/dresden-fans-campaign-to-save-their-show/

"With so many different campaigns going to save shows recently it could almost be a weekly feature here, and here is yet another for you to consider. I bring this one up partly out of a selfish desire to see it succeed, because The Dresden Files has become my second favorite Sci Fi Original, but also because I think it actually has a shot at working..."

Read the rest of the article at:
http://www.tvsquad.com/2007/07/11/dresden-fans-campaign-to-save-their-show/