Lately, I've been toying around with a new tool called Open Heat Map. This site will let you import a spreadsheet to create an interactive heat map showing the amount of a certain activity as a geographic image. This map I created shows the amount of distributions sent to different cities in the United States in March 2011. You will see our members sent the most distributions to New York City in March. Other high targets for distributions were Washington, DC; Los Angeles, CA; Chicago, IL and Seattle, WA.

You can see the map I created here: http://www.openheatmap.com/view.html?map=GroundingsBloodhoundsBeacon

Try out the site and see what types of data maps you can create.

-Zach