Google is really pushing the arguably dying Google Buzz. Now, Google is placing a layer of geo-specific Google Buzz threads in Google Maps. To view the Google Buzz layer from your computer, go to Google Maps in your web browser and select Buzz from the More... menu in the top right corner of the map.
Here is a picture of turning on the Buzz layer:
Here is me zooming into my University:
(note: I only spent one semester in the new building)
If you look at that specific buzz, you can see it was brought into Google Buzz from FourSquare.