CAIDA (Cooperative Association for Internet Data Analysis) has a wealth of information, papers, analysis, and tools on their web site, including mass information visualization tools that have been developed and links to information about the visualization techniques. You can also get cool posters of the Internet. In their “about” page they write that CAIDA is,
a collaborative undertaking among organizations in the commercial, government, and research sectors aimed at promoting greater cooperation in the engineering and maintenance of a robust, scalable global Internet infrastructure. CAIDA provides a neutral framework to support cooperative technical endeavors.