http://www.macrodigest.com/

The site is here, and it presents recent macro discussions on an issue-by-issue basis in easy to use, easy to scan form.  Furthermore it covers links which I otherwise would not see.  I not only visit the site every day (or more), I use it every day, and there are no more than half a dozen aggregator sites where I would say that.

Definitely recommended, and it comes from the LSE Department of Economics.