Comcast tests public WiFi

omcast, the cable and high-speed internet provider, is test marketing a public wifi program which allows subscribers to access the internet while away from their homes. Since this is a preliminary trial, there is no information on any expansion in NJ or other states, or if the service could be available to non-subscribers. Of course, certain cities have started their own initiatives to have wireless signals available everywhere—can a system exist where several companies are offering competing public wifi?