Plugin Idea: Heatmap Module
Once I've considered showing a heatmap in the user profile like the one you see on GitHub. It was not interesting enough and that's why I haven't thought about that a second time. Now I have been thinking about how useless the Facebook timeline is, but I've also remembered the heatmap - I think that could be a great plugin!
I think a module for the discussions controller that consolidates discussions by creation dates is not as interesting...