Working with Trees in the Phyloinformatic Age by William H. Piel discusses the processing and display of phylogenetic trees.
The PhyloWidget that is mentioned in the slides can be found at: Phylowidget
If you are working on topic maps in bioinformatics, this should be on your list of works to review.
I was particularly amused by the advice given at the Phylowidget site in its step-by-step instructions:
* If you are a biologist: we recommend starting with the First Step and moving forwards.
* If you are a developer: we recommend starting with the Last Step and moving backwards.