Clearly the next step in human evolution is to develop a sixth sense that makes the hairs on your arm stand up or your belly button flash green when in range of a wi-fi signal - but until then we're stuck with rubbish novelty items to let us know when there's some stealable internet nearby. And now it's wi-fi shoes. Or, at least, it's a concept piece, in which a pair of trainers have had a miniature wi-fi detector stuck on them...