Since the release of iPhone 4 and iOS4, the tech world has been caught up either praising the new device to death or parsing Antennagate into oblivion. But while so many have been focusing on the glory and flaws of Apple’s newest product, my attention has been squarely on an old one: my trusty iPhone 3G, which is now 2 years old – and is signficantly crappier, thanks to the iOS4 update. After the initial update, my 3G was so slow as to be almost completely unusable. Basic tasks like checking email or opening a browser could take well over a minute to complete – unless, of course, they crashed first. Using…