Well not everything that could conceivably be put in a statusbar is currently available elsewhere. I mean, given that such a feature should have scripting support such as chaning text, adding new "cells", adding icons, etc, you could put just about whatever you want in there. But just to mention one thing that could be nice "You are currently marked as away." Away status is shown in the titlebar, but only in the status window. Would be nice if you could put it in the statusbar and have it displayed for all windows on a particular server. I know there are numerous times where I'll forget I set away and just start talking without ever /away'ing. But like I said if scripting support is added, it can have whatever you want, "Remember to go to the store at 1:00pm", and again, if you don't like it, just disable it.
