Friendly Faces A Harvard student creates a new way for students to network and revolutionizes how this generation's classmates connect.

Vital Stats: Mark Zuckerberg, 21, of Facebook in PaloAlto, California

Company: Social networking site for college and highschool students

Campus Communication: Programming since sixth grade,Zuckerberg caused a sensation while he was a Harvard sophomore.Always looking to ease the transfer of information between groups,he created an online technology that allowed Harvard students topost profiles, browse or search for fellow students, view uploadedpictures, and share their affiliations and interests. Within twoweeks, two-thirds of Harvard students signed up. Three weeks afterthe February 2004 launch, Zuckerberg opened it up to Columbia,Stanford and Yale; now it's available to students (and somealumni) at more than 2,100 colleges and universitiesinternationally and 22,000 U.S. high schools.