[Digital Jedi]

It's not like Social Networks are a new thing. When they were, they were predicting the demise of forums then. And even then, it was a baseless prediction, since Social Networking and forum discussion are completely different animals. One does not cut into the effectiveness of the other. Social Networks are some of the worst places to have discussion, whereas you're not going to go to a discussion forum to see what your family, friends and former classmates are up to.

As far as pricing goes, you can't predict what's entirely an arbitrary decision. Developers will charge whatever they think their product is worth. Which is why forum software pricing runs the gamut now from $60 to thousands of dollars.