I think it would be neat if there was an app for both iOS and Android that takes note of when you send a text message to someone and measures how long it takes for them to respond.. Also use phone calls to see how many times they answer the phone when you call. Then it assigns that person a rating on how quick they are to respond. Add a social function on to that.. Display that rating on your contacts and messaging feed. and on your profile for all social networks. G+, FB, Twitter, linked in, etc.. Might help motivate quicker responses and give people feedbackon how easy you are to reach.
What you think?