The folks at Facebook have long bragged that they'll never charge for use of the social network -- but there might be a loophole opening.

Facebook is trying out a plan to let users pay a set amount to highlight posts they want friends to pay closer attention to. The pilot program is being tested at a number of price points -- anywhere from a few pennies to two bucks a pop.

Tumblr has already put a similar plan into effect for its users, with feature privileges running users a dollar per post.  (UpRoxx)

Let me just say, the SECOND Facebook starts charging for ANYTHING, I'm out.  This is already a multi BILLION dollar company, and if greed gets in the way, and they feel they need to charge children and adults ANY additional fees so they can make even MORE crazy money, they will fold to the next social network site.