Steve Jobs can do no wrong: Hundreds of thousands of Americans flocked to Apple stores and gadget retailers across the country Thursday to get their paws on the latest incarnation of the iPhone. By the end of the day Best Buy was sold out of the new iPhone 4, while RadioShack and Walmart said that they were scrambling to replenish their stock for the weekend rush. "They can't get here soon enough," a spokeswoman for Walmart said. Apple isn't sure when stores will receive fresh shipments. "The demand for iPhone 4 is off the charts," an Apple spokesman said. "We are working hard to get them to everyone as quickly as possible."