Live demo of zooming a large tree

After the teaser on Friday (see Deep zooming a large 2D tree) I've put a live demo of my experiments with viewing a large tree online at:

http://iphylo.org/~rpage/deeptree/

The first example (Experiment 1) is the NCBI classification for frogs:

Simple deep tree viewer from Roderic Page on Vimeo.

This version displays internal node labels, leaf labels (as many as can be displayed at a given zoom level), and works in Safari, Firefox, and Internet Explorer 8. Obviously this is all pretty rough, but take it for a spin, I'd welcome any feedback.