I saw this book listed somewhere (probably a library blog) a while back and it was recommended as a great primer on how technology and Internet learning is actually creating more class differentiation in this country rather than the opposite.
I always liked this article when I was linked to it some time ago. The author succinctly describes why so many people get very excited about social media but end up doing some very not smart things with that technology. This particular author is a little snarky but I think he gets to the point about how we need to present ourselves on the Internet, rather than just putting ourselves out there "as is."