And don't swallow the myth of the digital native. Just because your teens Facebook, IM, and Youtube, don't assume they know the rhetoric of blogging, collective knowledge gathering techniques of taggers and social bookmarkers, collaborative norms of wiki work, how to tune and feed a Twitter network, the art of multimedia argumentation - and, by far most importantly, online crap detection.

I teach courses today on social media issues at Stanford and Berkeley.

The most important critical uncertainty today is how many of us learn to use digital media and networks effectively, reasonably, credibly, collaboratively, civilly, humanely.