The Google of Communication would first need active participation from the service (telecom+internet) providers to share client data for tagging every node of use. A feedback based approach would be required. The next step would be to have a self training system which can constantly rank the source node based on collective responses and the degree of relativity between the nodes in case of failure(reported as spam) and thereby blacklist the source node if the failure exceeds a threshold. In addition the source can have the provision of modes viz, personal, business, marketing,..This way we will be able to rank our contacts and respond to them better by customising our receiver profile.
Or am i exposed too much to science fiction? : ))

I would appreciate complete ubiquity as well – at home, at work…at the cottage it keeps watching/learning and trying to consistently reassign priorities. With some luck, the bank of whoever will simply stop calling me….

‘slong