Facebook hits 300 million users. What's next for social networking? - washingtonpost.com

Five years from now, will Internet historians signpost the Facebook movie, due out in 2010, as the beginning of the site's end?

"West Wing" writer Aaron Sorkin is writing and producing the flick, called "The Social Network," about Facebook's birth. Jesse Eisenberg will play founder Mark Zuckerberg, and Justin Timberlake is cast as Sean Parker, the first company president...