The Canadian company CellWand Communications has teamed with Single Touch Systems to allow AT&T Mobility, Verizon Wireless, and Alltel Wireless customers a new service. It is almost too simple. Need a cab? Press #TAXI on your cell phone. Already successful in Canada, ST’s CEO Anthony Macaluso calls it “like 911 for a taxicab.” The new service is pay per use with Alltel and Verizon subscribers coughing up $1.50 per call, while AT&T users will pay $1.79. Other carriers may be added later this year.