Can I really earn money in facebook?

ofcourse,you can make money on facebook!the market is absolutely huge i make money on facebook everyday by following the techniques on http://www.takeadvantageoffacebook.blogspot.com

You can create a app then you will get paid for everyone that uses your app

Yes, you can definitely make money on Face book. You may find this article useful and interesting. http://vijayanths.blogspot.com/2010/08/can-we-really-make-money-on-face-book.html

You can join cloudcrowd on facebook, they pay you for writing and editing tasks, sometimes for singing too. If you can do this, you can earn quite a good amount there.

yes you can.... just last month i have been invited/notified to join a company via facebook tag wherein you will be working for facebook, you will be attending seminar and you can work full time or part time depending on the task you choose... their office is located at greenhills, i am very interested but i wasn't able to attend the seminar though because it's my delivery month... :D i just dont know if all the positions have been filled up.