You mean something more general, e.q. not necessarily related to a particular project?

> denoting which projects have outstanding todo items on them to differentiate them from those that don't

Yes i thought about something like that too. Maybe i will show the progress of the project related to its timelines. Or the hotness of the projects related to the number of comments in the recent days. I will seriously look at the possibilities on this page.

Thanks for the feedback!