The people in my neighborhood

Shout out to Mark Pilgrim for building a web service that visualizes relationships between web sites (via Google) quickly and succinctly. Going down my “neighborhood” list, I see a lot of familiar faces and quite a few I don’t recognize.

Question mark: has Google’s API obviated the need for data mining? It used to be that you needed very expensive algorithms and extensive data sets to predict these kinds of relationships (a la Amazon’s recommendation engine). Google has the data set now and has exposed the algorithm via “related sites.” Of course, the catch is your site has to be visible to Google to be able to play.