Based on phone calls to stores and interviews with people in line, two different analysts concluded that Apple sold out their inventory of iPad 2s in just over a day. Gene Munster at Piper Jaffray guesstimates that Apple sold 400,000 to 500,000 units, up from the 300,000 iPads sold over the launch weekend a year ago. In their customer interviews, 70 percent of the buyers were new iPad buyers, and 24 percent of those buyers already own a Kindle. Deutsche Bank also called about 100 stores and said, “Our checks pointed to a shocking 100% stock out rate across Apple/authorized […]