From the AJC(reg req'd): In a move that could sting UPS, Dell, the nation's biggest computer maker, plans to ship many computers to U.S. post offices for customer pickup, rather than directly to buyers' homes. That will shift some shipments away from Sandy Springs-based UPS, currently Dell's primary deliverer for computers. The computer maker is unsure how many computer shipments will ultimately be affected, Dell spokesman Andy North said Tuesday. Jim Cochrane, manager of package services for the U.S. Postal Service, said he thinks "significantly less than half" of the shipments UPS now makes for Dell will be affected. He said capturing Dell's business probably will add annual revenue in "double digit" millions of dollars.