Visualization of graph data is incredibly challenging, particularly when it comes to extremely large, scale-free graphs and social networks. A few simple searches on the Web and you will find some mesmerizing and very cool images. Perhaps the most cited...
My advisor is Prof. Ben Shneiderman, and I am a member of HCIL. My research is in the Information Visualization area of the Human-Computer Interaction field. My current research involves Network Visualization. I developed a tool called NVSS (see NVSS project page) to visualize netwoks (citation networks, food webs, social networks, etc.) using semantic substrates.
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M. Chatti, M. Jarke, T. Indriasari, and M. Specht. Learning in the Synergy of Multiple Disciplines, Proceedings of the EC-TEL 2009, volume 5794 of Lecture Notes in Computer Science, Berlin/Heidelberg, Springer, (October 2009)
P. Heymann, D. Ramage, and H. Garcia-Molina. SIGIR '08: Proceedings of the 31st annual international ACM SIGIR conference on Research and development in information retrieval, page 531--538. New York, NY, USA, ACM, (2008)