Washington Post "Buzz Maps" Track DC-Based Bloggers

The Washington Post has selected blog aggregator site Outside.in to provide Buzz Maps of DC-area bloggers on WashingtonPost.com, according to the Outside.in blog.
A "Buzz Map" (see image, which you can enlarge by clicking), tracks both DC-based bloggers and the places they are discussing in the area. The service also maps the top 10 places mentioned, based on volume in a given week.
The service went live on WashingtonPost.com last week, but not much is there, yet. 63 cities currently comprise the Outside.in database. Outside.in helps marry local advertising with local geo-specific bloggers. EveryBlock, a similar startup (but with much less apparent traction), provides geo-filtered news and data in Chicago, New York and San Francisco, according to Silicon Alley Insider.