Apple on Wednesday finally unveiled its tablet computer, called the iPad, at an invite-only event at the Yerba Buena Center for the Arts in downtown San Francisco. The device, which looks like a larger version of Apple's iPod Touch will be available in two to three months, and starts at $499. Read on to get a quick overview of everything that was announced, and why it matters. Apple Keynote Video New hardware: The iPad Apple's CEO Steve Jobs introduces the iPad (Credit: James Martin/CNET) Proving rumors right, Apple unveiled the iPad, a device that looks akin to a large iPhone or...