It's here alright. Until we can communicate telepathically - via our phones I bet - being able to send instant SMS messages around the globe will have to do.
When 3G (or 4G, or the next one) is more accessible to everyone we'll have a whole array of ways to communicate instantly with literally almost everybody on earth (for reasonable values of "almost"). Twitter, traditional IM, IRC, Skype, ...
I want a netflix recommendation system, but for friends. I can communicate with anybody on earth, but I only know a handful of people in the immediate vicinity.
When 3G (or 4G, or the next one) is more accessible to everyone we'll have a whole array of ways to communicate instantly with literally almost everybody on earth (for reasonable values of "almost"). Twitter, traditional IM, IRC, Skype, ...