I would like to see us abstract another layer between an arbitrary number and a person. We do have another system by which you enter a seemingly-random number t

I would like to see us abstract another layer between an arbitrary number and a person. We do have another system by which you enter a seemingly-random number to connect to the person, and we abstracted it with DNS. If you're a Facebook user, privacy concerns aside, you can change your number there and it gets updated on your friends' phones, I think. Is there any sort of OSS tool to do the same - automate updates to your contact info, so you don't have to tell your friends when you change the phone number which ingresses to your voice chat/SMS systems?