Apple seems to realize that whether they like it or not, social networking needs to see a greater piece of their software puzzle. And based on what I am reading here, I would say the chances are excellent that this is happening with the greatest of intention.
Imagine being able to share music easily, right from the Apple desktop. While this functionality will likely have tight integration with iTunes, I imagine this will also play out in other aspects of OS X as Apple pushes forward with more social networking integration.
Now it should be said that at this moment, all of this is basically rumor. And we all know how these things can play out. Half true, etc. But if this is even half right, I think it is going to play out in a very positive way for Apple users.