This article by Danah Boyd, of whom we've seen before, talks about how teens are switching over from Myspace to Facebook and how a persons socio-economic class shows which site they are more likely to use.

This talks about a principal wanting to block facebook and myspace from being accessed at the school due to sexual predators and mean girls

Thought that looking up "cyber friends" on Urban Dictionary might be helpful. I thought it would be a little amusing, but it is actually pretty straight forward instead of humorous.

"A few weeks ago I was over at my Aunt and Uncle's place helping them re-jailbreak a first generation iphone I had bought for them in Augusta last spring. Our conversation drifted into why they both haven't signed up on faceboook yet. The short answer was - they are already connected to their friends."