Real-time patterns of wifi usage at Carnegie-Mellon University are plotted on this map.

I’m intrigued by the brave souls who appear to be using their wireless devices outside the shelter of the buildings, as current weather in Pittsburgh doesn’t seem too compatible with alfresco work…

» CMUsky.org: All Connected WiFi Users::Carnegie Mellon Campus
[found via the still-chugging-along-nicely warchalking.org]