Mid-Air Messages To Your Mobile

wilfie writes "Mid-air messages are content for delivery to handheld devices which is relevant to the user's current location. A serious trial of a system for delivering mid-air messages is to be financed by the UK government in the City of Bristol, according to an article on the BBC website. The article refers to the Annotate Space project doing something similar in New York. The Bristol scheme looks like being a guide for tourists, but what other kinds of content would we welcome, and what would we not? Would we even be willing to pay for it?"