As the people you know sign up for more and more social networking sites, using an aggregator to keep up with their activity has become a necessity.ᅠ The trouble is, typically you must bug your friends to sign up for the service you want to use to follow them, which is a hassle for everyone. Whoisi.com is a new service Mozilla's Open Source Evangelist, Chris Blizzard, developed in his spare time. It's user-friendly, doesn't require you to hassle your friends into signing up, and, as expected, relies on open data and APIs.