iPhone 4 goes on sale

Apple's iPhone 4 goes on sale today and queues are expected all over the world as demand will almost certainly outstrip supply. The latest iteration of the pioneering app phone - which addresses many of the shortcomoings of previous versions including a better camera, a front facing camera for video calls, multitasking and a vastly improved display - attracted 600,000 pre-orders on its first day on sale a week or so ago. Originally intended to be available in both...