Answer: facebook

AnswerCrossword Clue
FACEBOOKPlace to befriend or be friended
FACEBOOKCompany in "The Social Network"
FACEBOOKWalls are an important part of it
FACEBOOKSubject of the 2010 film "The Social Network"
FACEBOOKSocial media website
FACEBOOKPopular surfers' hangout
FACEBOOKSite to read the writing on the wall?
FACEBOOKAlternative to Friendster or MySpace