The tooltips for status window are done and I'm wondering why nobody's written the widget and published it yet. If someone has and I haven't found it then I must really suck at searching. Anyways, I've now learnt how to write custom widgets in GTK, so all is good :)
Philip suggested I look at Gaim's method but those guys had written the tooltip code along with the status window code. So we have a more modular approach in that case. The outcome is not very different looking for now -- I want it to look even better though.