I'm presenting a "paper" at the 2008 Kentucky Economic Association meetings today in Lexington, Ky. The title is "Some Economics of Economics Blogs" and it is co-authored with Aaron Schiff of 26econ.com. In the "paper" we consider overall economics blog market trends and consider blog demand and supply using data that Aaron has collected (see here and here).
I'm thinking the "paper" might be a good fit at the AER, JPE or Econometrica.
Here is a link to the PDF of the KEA presentation: Download kea_presentation.pdf
Note: "paper" = not written yet but hopefully will be soon.