Well, since it seems that there doesn't exist a python routine for making dendrograms, I made one myself. At the moment the package isn't as complete as I want it to be, but I'd like some feedback on it from interested parties.
The first beta release can be downloaded from the link below:
http://www.umit.maine.edu/~r.springuel/000CCFE8-80000018/S2AF592D6.-1/ClusterPlot.py
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R. Padraic Springuel
Teaching Assistant
Department of Physics and Astronomy
University of Maine
Bennett 309
Office Hours: By Appointment only during the Summer