GENEVA — Worried over U.S. domination, a group of developing nations wants to put control of the Internet into the hands of the United Nations, an issue that likely will overshadow a summit on information technology opening today. Key decisions on Internet issues, such as domain names and addresses, now reside in a private agency spun off from the U.S. government — and the United States wants to keep it that way. But if countries do not think their concerns are adequately heard by the Internet's key decision-makers, a U.N. official warned yesterday, they may create conflicting national policies and...