Order an iPad 2 from the Apple Online Store and it may take 4-5 weeks to arrive.
Apple’s own retail stores are also facing shortages “with many customers walking out with a model they didn’t particularly want or nothing at all,” says “9to5 Mac” (http://macte.ch/0obv0). Apple’s online store originally quoted a 3-5 day ship time but that jumped to 5-7 days to 2-3 weeks all within a few hours.