Celebregion

Mark weds Priscilla      A day after the historic Facebook stock offering,facebook founder Mark Zuckerberg on Saturday wed 27-year-old Priscilla Chan , his girlfriend of nearly a decade.       Zuckerberg gave his new bride a ring he had designed with a "very simple ruby" to end an incredibly eventful week, according to a guest.     The couple married at his Palo Alto, Calif. home in front of fewer than 100 stunned guests who thought they would be attending a party to celebrate Chan's graduation from medical school. On Monday, Zuckerberg turned 28 and Chan graduated from the University of California, San Francisco School of Medicine, where she'd studied pediatrics.     The wedding had been planned for months and the couple was waiting for Chan to finish medical school, but the date of the IPO was a "moving target" not known when the wedding was set.      Attendees, including Facebook's chief operating officer Sheryl Sandberg, were told af