Interesting Person of the Day
A simple site/app that selects for you an interesting person to know about each day. It would provide a history about the person, showcase their work, list their achievements, link to books written, links to related people.
A user would propose an IPD (Interesting Person of the Day), and a period of contributions would start. Users would write the intro, provide links, etc. When the content is deemed OK by the community and the queue is ready, it would be published. Once something is published, everyone would be provide comments, curiosities, etc.
If it grows, you could get Interesting persons per category (Art, Design, Business...)