TweepsMap lets you map your Twitter followers to reveal where in the world they all are. So, where are all the sciencebase tweeps. The site lets you display their whereabouts on a map as the name would suggest:

You can also display the stats as a pie chart. Mmmm…pie…

It also lets you drill down to state/province and/or city:

The TweepsMap site also offers a widget that lets you embed a live map of your twitter followers on a website or blog:

Of course, the accuracy of the service is wholly dependent on your followers entering their location honestly in their twitter bio. Lots of people seem to put “somewhere” or another non-geo location either for personal privacy reasons, obfuscation or simply for fun…