Mark Zuckerberg and Priscilla Chan get all the press, but they're hardly Silicon Valley's only pair with ten figures between them. Dropbox's twentysomething CEO Drew Houston just became a billionaire — and we hear he didn't reach that milestone alone.

That was fast: Six months after he started seeing Alexandra Lenas, Sean Parker is engaged to the singer/songwriter. Parker has made a number of sudden life changes since Justin Timberlake played him in The Social Network, actually.