CPSC 533C: Information Visualization, Fall 2011-2012 by Tamara Munzner.
I found this page while looking for the software described in: CiteWiz: A Tool for the Visualization of Scientific Citation Networks (2007).
Very good course outline with links to lots of outside reading. Not to mention there are pointers to other visualization courses, software, etc.
If you want a solid grounding in visualization, it is hard to think of a better place to start.
Any number of the articles or software packages merit separate blog posts to point up their relevance to and/or use for topic maps.