iPhone 4 is out. Hurrah! But I don't have one. I still have 2 years to wait on my contract before I get a chance to sample the delights of Apple's latest and greatest, by which time iPhone 5 will probably be a distant memory. Roll on iPhone 6! In the interim, though, I am fortunate enough to own an iPhone 3GS which (mostly) supports the new functionality, albeit with a somewhat lower resolution display. Of course, any display is a retina display if you hold it far enough away from your eyes, so I'll just have to hold my phone at arms length whenever I use it. A small price to pay! Seriously, though, there are some nice new features in this update. The whole thing feels a little more polished, too. The Snow Leopard style reflective dock, for example, and the additional zoomy animations. Some people have been complaining about slow down, but I can't say I've noticed it generally. Multitasking The big ticket item in the iOS4 upgrade is multitasking. Many pe...