Email a copy of "Yahoo to buy Facebook for $1 billion?" to a friend.
Yahoo is reported to be in talks to buy social networking website Facebook for $1bn.
Facebook has also held separate discussions with Microsoft and Viacom, according to the Wall Street Journal.
Founded in February 2004, Facebook has quickly grown in popularity, and by the end of 2005 had more than 7.5 million users at US schools and colleges...
