Facebook creator Mark Zuckerberg has changed his profile status to "married" on May 19. In a life-changing week, he turned 28 on May 14, and then became worth $19 billion as his social networking site went public four days later. To top off the banner week, Zuckerberg pulled off a surprise wedding to his girlfriend of nine years, Priscilla Chan, whom he met at Harvard before he founded Facebook. Fewer than 100 guests gathered at Zuckerberg's Palo Alto, Calif., backyard thinking they were about to celebrate Chan's graduation from medical school at the University of California, San Francisco, but instead wedding bells were ringing for the college sweethearts! The surprised guests enjoyed food catered from the couple's favorite local eateries: Palo Alto Sol and Fuki Sushi. For dessert, the newlyweds gave everyone Burdick Chocolate "mice," which the couple had on their first date in Cambridge, Mass.