This site is department specific and is not searchable, so information is somewhat difficult to located if you do not know what department oversees the issue you are looking for, but once you find the department you will often be pleased with the information you locate. I am an avis user of the endangered species page and the National Wildlife Refuge Systempage, for they are both information rich resoruces. This site provides information about phylogenetic relationships and characteristics of organisms, and links biological information available on the Internet in phylogenetic order. The site includes over 1320 pages, housed in 20 computers in 4 countries, and the list of contributors is very impressive. The one big drawback is they have a huge job ahead of them.
Some taxa are very complete, while other taxa are listed and that is all.
The site can be searched by organism name or taxa, or you can browse by phylogenetic relationship. The species pages usually include descriptions, bibliographies and references to appropriate WWW pages. This site is developed by the University of Arizona, and is tested out on their students every year. Information is broken down by biochemistry, cell biology, chemicals and human health, developmental biology, human biology, Mendelian genetics, immunology and molecular biology. The site is very valuable once you know where things are located, but it would really help to have a contents page, or if the site was searchable.