From Business Week – In the gambling industry, everyone is watching Macau, the spit of land south of Hong Kong that is rapidly supplanting Las Vegas as the world’s gaming capital. But don’t count Vegas out just yet—some of the world’s high rollers in Macau appear to be curious about that famous Strip in the desert. Wynn Resorts (WYNN), Las Vegas Sands (LVS), and MGM Resorts International (MGM) have been expanding rapidly in the Chinese enclave, lured by the enormous opportunities of a large and growing middle class, plus wealthy gamblers. As the Macau business grows, American gambling companies have…