Some figures for thought:
While Facebook has not officially been sold, it still looks like News Corp. got the best deal in terms of price and overall reach. A lot can still change however:
1) NBC is revamping iVillage to be an all inclusive, NBC Universal-online destination
2) Yahoo! could purchase Facebook and take social networking to new levels
3) MySpace, although still the leader, could lose some ground if the other social networks develop dynamic and exciting new features.