Today marks the beginning of the Apple Worldwide Developers Conference (WWDC) in San Francisco. The big event is aimed at developers and IT professionals, who get the chance to soak up all kinds of deets about the iPhone OS and Mac OS X from the engineers who created them. It's also the day Apple announces exciting updates. In fact, the rumor mill believes there will be some hot new iPhone software and features by the close of the conference. Have you been enjoying your apple a day? Take my quiz and find out, and be sure to keep checking back here later on for all of the keynote updates, live from the WWDC!