Facebook keeps powering its way toward an initial public offering as the winner of the battle for dominance among social networks. I wonder how worried Mark Zuckerberg, its founder, is when he considers the ranks of his fallen rivals.The most recent is MySpace, the music-dominated social network that was also growing rapidly when it was bought by News Corp for $580m in 2005. Things have changed - News Corp is now warning that MySpace faces a harsh fate if it does not do better soon.
