A summary of their aggregator's role is:
"The Federal Reserve Bank of St. Louis is launching a blog aggregator, EconomicAcademics.org, to highlight and promote the discussion of economics research. Your blog is part of this effort. This email explains why and how you can help promote the discussion of economic research in the blogosphere."
The aggregator can be found at EconAcademics.org/
Of course they have upwards of 350 economics blogs listed, but we are glad to be doing our own small part to keep the world spinning :)