the visual representation you've chosen for the graph makes it pretty, but also pretty useless.
also there are IRC stat bots that do that shit constantly. I like it because it's cool to see what time zones a channel is most active in. Like wetfish is clearly almost entirely US but I've been in channels that have strong contingencies from Europe, Asia and Australia and are *always chatty*. its wonderful. i love internet.
maybe we could have one of those in wetfishglsdf