Austin, Texas -- Isis, the mobile commerce joint venture created by AT&T Mobility, T-Mobile USA and Verizon Wireless, announced that Aeropostale, Champs Sports, Dillard’s, Foot Locker, Jamba Juice and Macy’s are among the first national merchants to join with Isis in advancing mobile commerce. The company also announced the first of its local merchant partners across Austin, Texas and Salt Lake City.