By John S. McClenahen Unlike last week's light load of economic indicators, this will be a busy week as the U.S. heads for the three-day Memorial Day weekend. On May 25 the Conference Board reports on consumer confidence for May and the National Association of Realtors releases data on April sales of existing homes. On May 26 the U.S. Commerce Department reports on April orders for durable goods and sales of new homes. On May 27 the U.S. Labor Department releases data on last week's initial claims for unemployment insurance and the Commerce Department releases its second take on GDP growth during this year's first quarter. On May 28 the Commerce Department reports on April personal income and spending.