Our data collector regularly connects to all registered IRC networks. After connection is established it requests current information, e.g. a list of active chat rooms or rather IRC channels. Received information is used for diagrams and reports that can be viewed on this website.
Here you see a small report about channel #rubinius on IRC network freenode. This kind of report usually includes user statistics and topics of the last days and weeks, if the channel was registered before and its administrators didn't set its channel modes to private or secret.