One of the things I find frustrating about TreeBASE is that there's no easy way to get an overview of what it contains. What is it's taxonomic coverage like? Is it dominated by plants and fungi, or are there lots of animal trees as well?

Among the many ways to display trees, degree of interest (DOI) trees strike me as one potentially useful way to display trees such as the NCBI taxonomy. For background see, e.g. doi:10.1145/1133265.1133358 (or Google "degree of interest trees").The thing that would make this really useful is if an application was written that, like Google Earth, supported a simple annotation file format.