from Efstathios Iosifidis
Based on the idea of http://maps.ubuntu.com/map/ my friend Efstathios and I, (mostly consulting), developed http://oshackers.org/. The site is a web application that can be used for visualizing the Free Software and Open Source operating system hackers, (developers and testers) from around the world.
OSHackers supports features not included in the Ubuntu maps application, such as (1) clustering, (2) short/detailed information about a developer by simply left-clicking on the system's icon, and (3) visualization of a specific system.
You are more than welcome to register and tell us what you think!