Macworld.com – If youâve been paying attention over the past few weeks, it should come as no surprise that the iPhone 4 is in high demand. More than 600,000 pre-orders and reservations were placed between Apple and its partners in the deviceâs first day of availability. The result crashed servers, networks, and iPhone apps alike. Shipping dates have been pushed back into July, retailers stopped taking pre-ordersâitâs been tumultuous, to say the least.