In light of current events, I think it is time to begin discussing "Peak Internet" in the same way that we discuss "Peak Oil" or "Peak Credit".
The last two weeks have included Comcast potentially de-peering due to end user traffic, the DNS system compromised with questionable legal authority and a a popular website forced out of US infrastructure.
I believe that 2010 represents the "peak" of the homogenous, globally routed Internet as we have known it. For what it's worth, we're guilty of some fragmentation of our own ...