Continuing experiments with a zoom viewer for large trees (see previous post), I've now made a demo where the labels are clickable. If the NCBI taxon has an equivalent page in Wikipedia the demo displays and link to that page (and, if present, a thumbnail image). Give it a try at http://iphylo.org/~rpage/deeptree/3.html or watch the short video clip below: Zoomable viewer with Wikipedia thumbnails from Roderic Page on Vimeo.