If you remembered, Facebook and Skype has worked together to provide video calling feature on Facebook. I have forgotten, actually. I believe many did not use this feature. Facebook is now reminding everyone about it by placing the “call” button on the profile page.
I have checked my Facebook account. I could not see this button on my friends’ profile. Nevertheless, the feature is already there. Just go to the chat windows and you can see the “call” button.
I went back to the Facebook video calling page. It actually shows that you will have the “call” button on the profile page. So, I am thinking that it may be rolling out to the masses.