Tweeting Map
Tweeting Map is an experimental visualization of near-realtime public geo-localized tweets. It was developed as a demo with no visualization goals in mind, but it is still nice to see where (and what) people are tweeting at each moment, or even not tweeting at all.

Each circle represents a tweet on its location. The color comes from user’s profile, and size represents the number of user’s followers.
A more technical description and source code are available on GitHub.