I haven't seen this network visualization site by Akamai before and I think it looks cool. They also measure attack traffic and latency/speed.
From the site on network traffic: "Akamai monitors the amount of data being requested and delivered - by geography at any given moment in time. Displayed in this interface are the top ten regions with the current highest traffic volumes.
Values are measured as percentage of global network traffic. Regions are displayed as countries or states. "
Use the slightly hard to find drop-down menu to display the map above which shows broadband adoption trend for North America, at 61 percent.