You've heard by now of this organization. It's just starting up, but looks to have potential. At minimum is can help raise the profile of issues important to progressives. I'd say they're intending to be the left's equivalent to The Cato Society, while the American Constitution Society is our Federalist Society.

I've signed up for all the content email the Center for American Progress will produce. I'm not intending to be an official organ or anything like that—it's a news-junkie think. But I do share their overarching goals and so will pass along anything I find important (with my personal amplifications, of course).