My choice? http://www.breamatters.org But then I am biased. Congrats Jason Young!
Best Blog Orange County 2012 - Save Anaheim
It's only been around for a couple of months, but this feisty blog (which originally started as "No Jordan Brandman" to target the idiot running for Anaheim's City Council) has gained a loyal following with a great mix of outrage, public-records requests, leaked photos and a righteous war against corporatists who want to reduce the city into the ultimate example of the 1 percent vs. the 99. Best of all is that the blog is all-Anaheim: author Jason Young lives in the city and is a graduate of Katella High School, although we don't hold that latter point against him, thanks to Save Anaheim's take-no-prisoners approach.