Map design by John Yunker showing relative sizes of top level domain country codes. Each ccTLD is sized relative to the population of the country or territory, with the exception of China and India, which were restrained by 30% to fit the layout. At the other end of the spectrum, the smallest type size used reflects those countries with fewer than 10 million residents. link via strange maps
There's another more interactive map out, similar to the ones I've posted before, using the Hilbert curve. Link here We map all 4,294,967,296 IP addresses onto a huge image and let you zoom into it and pan around. Just like google maps, but more internetty.
UPDATE: Here's a great blog post on the ICANN blog that I missed when it first came out. The same structure of the XKCD comic and adds color to indicate regional allocations and free space.
From Chris Harrison's site: The Dimes Project provides several excellent data sets that describe the structure of the Internet. Using their most recent city edges data (Feb 2007), I created a set of visualizations that display how cities across the globe are interconnected (by router configuration and not physical backbone). In total, there are 89,344 connections.