Your existing iPhone (yeah, even the original) can surf the information superhighway at 4G speeds. Today. Who knew, right? Sprint's Overdrive -- which creates a WiFi hotspot that enables nearby devices to cruise on Clear's 4G (or 3G, if you're not in a 4G locale) network -- can theoretically enable any WiFi-capable phone to surf on WiMAX, but Sprint's taking a pretty bold approach by actually touting the feature in a new spot. Befuddled? Hop on past the break and mash play. Too bad this is about as close the iPhone will ever get to Sprint's shelves...