I'm working on something at the moment. More experiment than anything else for the time being but the purpose of it is to have a minimal "social network" for keeping in touch with people, and that's about it. Very little in the way of notifications and most facebook-like features. Just a way to keep in touch and keep contact details for people you care about.
Question for anyone who would be interested in such a thing: How would you suggest monetising or funding such a project?