Due to the massive popularity of the iPhone 4, Apple’s shipment estimate for new online orders of the handset has been pushed to three weeks. It took less than 24 hours for Apple to sell through its launch-day allotment of iPhone 4 units online, pushing the estimated ship date back to July 2; hours later, the date was pushed back again, to July 14. In a brief statement included in the company’s announcement of 1.7 million iPhone 4 units…
