Turkle doesn't have a whole lot of truck with places like Hubski. Life on the Screen, the 2nd in the trilogy, is all about identity play and how important it is to discovering self. Her primary beef is with the short-term, context-free missives one gets from places like Facebook, MySpace etc.

Lil - you have the patience and the insight to enjoy the books in their publication order. The Second Self was written in '84 and revised in 2013. It largely deals with "huh. Computers are something new on this earth and we react to them differently." Life on the Screen is basically "we have created a new way to interact with each other and it is not like the way we have always interacted." Alone Together is basically "this new technology we created is a poor substitute for what we used to have but because of how it's designed, we use it as if it's just as good" while Reclaiming Conversation is basically "so the end is here, there's nothing we can do about it, except there sort of is, try this."

EDIT: It occurs to me that you teach comp sci people to communicate for a living, meaning Turkle is someone you should be able to quote to me, not the other way 'round. She's basically made a career at MIT studying the basis for your career. She was one of the people behind Kismet, for example: