Answer: facebook

AnswerCrossword Clue
FACEBOOK

Place to befriend or be friended

FACEBOOK

Company in "The Social Network"

FACEBOOK

Walls are an important part of it

FACEBOOK
Subject of the 2010 film "The Social Network"
FACEBOOK
Social media website
FACEBOOKPopular surfers' hangout
FACEBOOKSite to read the writing on the wall?
FACEBOOKAlternative to Friendster or MySpace