Organic
It's hard to think of an agency as a news source, but Organic's Three Minds blog actually blurs the line -- in a good way. There are six dedicated "channels" that cover everything from creativity and culture to analytics and strategy. There's also a "seventh" channel that allows readers to customize the news they get. Pretty cool, right?
Channels have dedicated "owners," as well as contributing editors. And each channel has at least three minds contributing on a regular basis. Not only is that an impressive look at the agency's roster, but it's also a very deep look. Put it this way: If you're the client, you usually hear a lot about what the agency thinks from one or two key contacts, and you usually don't get much input from the lower-level employees who often put your campaign into action. What's nice about Organic's blog is that contributions seem to come from various levels throughout the agency.

The other big advantage to the Organic blog is that it's a sound forum for industry thinking. For a number of reasons, many great agency blogs don't get a ton -- or any -- comments. But that's not true at Organic, where readers aren't shy about sharing their opinions.