Geo/Social stalking is fun. Bing maps has the ability to add various "apps" to the map to enhance your bind maps experience. One of the cooler ones is the Twitter Map app which lets you map geotagged tweets.
Let's start with somewhere fun, like the pentagon, and see who's tweeting around there
Once you have your places picked out, you can click on the Map Apps tab.
As you zoom in, you get a bit more detail
You can also follow specific users and follow them around town :-)
thanks to indi303 for telling me about this