As promised, Apple today launched the iPhone 4 at retail. The smartphone has faced especially large cues that have been both long and sustained; the 5th Avenue Apple Store line at opening was described as being much longer than for the iPad and iPhone 3GS. In the UK, where the phones have been available for several hours, there are still queues for at least some stores, such as London's Regent Street flagship and the Oxford Street O2 store.
