Caesars online poker plans to go live this summer in Nevada, the only U.S. state so far to offer legal Internet gambling, and will promote the nascent service to thousands of poker players at its World Series of Poker (WSOP) tournament in Las Vegas starting May 29. Caesars is among several gaming companies preparing to go live with online sites in the United States which could eventually generate billions of dollars in revenue for the casino industry and local governments. “We anticipate our arrival to be sometime this summer,” Seth Palansky, a spokesman for Caesars Interactive, told Reuters, adding the…