At the online gaming site associated the Foxwoods Casino, customers can play nearly every game and buy credits that build up reward points for merchandise and hotel stays at the real property. One thing they cannot do, at least for now, is wager real money. Foxwoods and its local rival, Mohegan Sun, the two biggest tribal-owned casinos in the United States, each have launched websites in case Internet gambling is legalized at the federal level or in their home state of Connecticut. While prospects for changes to the law remain uncertain, the casinos have found the sites offer value as…