One of my characters has a new Twitter account, and is beginning to feel his (well, spirit guides have no gender really, but 'he' is happy enough to be male for the moment) way. He has told me it is a real treat to communicate so clearly with in-body humans. Usually he is hugely frustrated because his people (See 'Lucy' in "Despite the Angels" when it comes out) never listen, or pick him up wrong.
If you would like to follow the musings of a guide, you can find him @TrynorTheGuide. He doesn't mind being called a guardian angel, either, although it is not strictly accurate. Angels are much higher beings, and rarely communicate with incarnated humans.