Facebook except it saves you time instead of wastes time

Looking for: Designer, Developer
Think about all the time people waste on Facebook and social networks. Think about the people you know that don't use it because it is such a waste of time. What if you could turn that on its head and make something online that helps you spend you time offline better. Isnt that a major unsung utility of Facebook... events?

Additional Info

  • Time commitment: half time (20h/week)
  • Idea stage: prototype development