I don't know what the "writing your app in Java" bit is about... Care to elaborate? Mibbit is written in Java (Custom written framework and server), and handle

I don't know what the "writing your app in Java" bit is about... Care to elaborate? Mibbit is written in Java (Custom written framework and server), and handles traffic just fine. Java is insanely efficient for network IO. It's an apples to frogs comparison, but if you measure 'page views' then Mibbit does bajillions, on a handful of servers.