TechCrunch posts an update on Outside.In, a service which brings a local twist to the blogosphere by associating blogs and posts with specific locations. This is a topic very close to my heart - I will be presenting a paper at ICWSM on geolocating bloggers. Outside.In uses user provided information to associate location with content - the information is provided specifically for the service.
We took a different approach - scraping profiles for user provided location information. By doing this, we created a reasonably large (and still growing) database of locations associated with bloggers (and, in fact, other social media authors).
We then started looking at an even more interesting problem: automatically classifying the location of an author based on their content. As far as we could determine, there is no real work published on this problem currently out there. Matthew Siegler, who did much of the work on this problem, found the initial results very encouraging. However, what started as a simple exploration of residence classification revealed itself to be a problem intersecting language, location, nationality and ethnicity at least!
Outside.In is not the first service to offer some form of local blog search. BlogDigger started a service based on meta geo information over a year ago.