As Apple rolls out its iBeacon technology across its Retail Stores and investigates using it to enable mobile payments, a number of large retailers are testing the technology in their establishments. Today, Shopkick announced it would be starting an iBeacon trial at 100 American Eagle stores in the U.S. This follows announcement earlier this month that InMarket would introduce iBeacons to more than 200 Safeway and Giant Eagle grocery stores in a number of markets across the country.