http://economistsview.typepad.com/economistsview/
The experiment mentioned above was discussed a couple of weeks ago, but I don't have the exact link.
He mostly finds interesting news or commentary items with an economic angle and excerpts them and sometimes frames them as well.
He seldom argues with those who comment, but the regulars manage to generate enough heat amongst themselves.
There are a few other economists who have also started blogs and they are now starting to quote one another, so his site will also lead you to others.
There are a few people from outside the US who contribute and I think if a few more participated it could only be a good thing. Policies not Politics ---- Daily Landscape