by Cyrus Farivar After seemingly endless weeks of rumors, Apple finally released its tablet computer, calling it the iPad. The device, which will sell worldwide at a starting price of $499 (€356.65) later this year, represents something in between the company’s extraordinarily popular iPhones and its line of laptops. “If there’s going to be a third category of device, it’s going to have to be better at these kinds of tasks than a laptop or a smartphone; otherwise it has…