Interactive Google Map using the Twitter API
Codrops has an interesting tutorial that shows you how to create a Google Map with the Twitter API.
The completed map uses the profile pictures of Twitter users as the map markers. The markers are displayed on the map using the Twitter API's geocoding service. If you click on a profile picture a custom designed information window opens displaying the last five Tweets of the selected person.
You can view a demo of the completed Twitter map in action here.