SETI is searching for a signal from space. What is this signal supposed to say? Hi, here we are.? We were broadcasting signals into space for 50 years before we actually knew we were doing it. Those first signals are still going, but they are not traveling in a big sphere. They're going in the direction that those first transmitters were pointed. Eventually we started transmitting from all over the world. Those first signals are what we should be looking for. If we detect a signal from a point in space, and it's not there tomorrow, maybe the planet that broadcast it is just pointing in a different direction. Instead of looking for a "We are here" sign, shouldn't we be looking for ET's equivalent of Howdy Doody?