Who is Priscilla Chan?

The wedding of Mark Zuckerberg to Priscilla Chan last weekend here in the backyard of their $7 million home had all the staging of a carefully orchestrated celebrity event. A publicist for Facebook eagerly offered photos afterward of the beaming couple, who met at Harvard and have dated for much of the last nine years. Well placed anonymous sources leaked to reporters the dinner menu, which included sushi and Mexican food, and the fact that Green Day’s Billie Joe Armstrong performed.