Here's one most people reading aren't worried about - yet: The social graph problem. What happens when you join social networking sites, whether for work or for "social?" For each new service - Facebook, Myspace, LinkedIn, ZoomInfo, and on and on (one estimate is that there are 5000 social applications/sites floating around as of now), you have to build a new network of "friends." What if you had just one and it belonged to you?
Web Worker Daily, my new best friend, reported on this a few days ago. Raises lots of questions. Different networks for different purposes? Of course. Do we need a site that manages your networks on all your other sites (as they say, this quickly becomes ratttthhhher meta)? Will any of this last anyway, in which case, why bother?
Patti Anklam ferreted out the Welsh word for this: cynefin, the place of my many belongings.
Many different networks, together a person doth make.