I keep a blog at Wordpress.
Here is a simple Freebase interface 4.22.2008
Genealogy of Influence is a dataset of influence links between historic figures, which I started working on in 2005.
A visualization of the dataset, made with the open-source Graphviz program: PDF 450kb - DOT 90kb
In July 2007, I added the data to the site Freebase.com where others have added new people and connections. It includes more than 4,000 people now. Some applications that use the dataset are listed below. Influence domain at Freebase.
Recent additions:
My applications:
Random Walk with Wikipedia frame:

License:
Genealogy of Influence is licensed under a Creative Commons
Attribution-NonCommercial-ShareAlike 2.5 License.
Wikipedia content is under the GFDL
Older versions:
Touchgraph applet

created using Touchgraph
(xml data)
PDF of the hierarchical layout
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created using yEd
(graphml data)