Chandra Levy -- they later exonerated him, I think, and arrested an illegal alien, who I think later got off as well. This scandal lives primarily as going on in summer 2001 before 9/11 destroyed our national innocence.
I never saw The Social Network and was pretty anti-Facebook at the time. I actually made an account because of my girlfriend at the time. Also Jesse Eisenberg looked like a giant douche on the posters and in the TV commercials.
I remember Tila Tequila. As a last grasp on Internet fame she got lesbian-engaged to someone or another.