New Prince of Persia to have Live Component
IGN is running a story regarding the upcoming Prince of Persia: Warrior Within. The Xbox version of the game will have downloadable content and leader boards thanks to Xbox Live. The leader boards will cover two self-contained competetive types of play: Timed Missions and an Arena. Info also available on the official site.
It's downloadable content and online rankings. There is no mode involving more than one player at a time. Which is understandable, considering the things the game does with time.