Filed under: iPhoneIf you're thinking about buying an iPhone 3GS right now, here's some very simple advice: wait. Based on not only industry rumors but also historical patterns of iPhone releases, it's widely expected that Apple will debut a new iPhone in less than two months. While we don't know anything concrete about the next iPhone, it seems obvious the next iPhone will have more storage, a faster processor, and possibly even more RAM than the current iPhone 3GS. All of that equals bett