This is a really great tech presentation and it reads very well too. It's interesting that it seems Twitter (and to some degree Facebook) are tackling really i

This is a really great tech presentation and it reads very well too. It's interesting that it seems Twitter (and to some degree Facebook) are tackling really interesting problems that span every layer of technology in a way we haven't really seen since the early days of Google. As a social graph becomes more integral to the applications many of us build, Twitter is a great example of what problems we may be facing down the road.