Most people are divided on this question. My information and sources tell me, Facebook will introduce send-money option, only question is when? No one seems to know.
Also see my detailed response to a similar question: Faisal Khan's answer to Why are start-ups or Facebook itself not using Facebook's large user base for money-transfer services?
Also see my detailed response to a similar question: Faisal Khan's answer to Why are start-ups or Facebook itself not using Facebook's large user base for money-transfer services?