Other
Biodiversity Tool Box: About Biodiversity
An extensive site detailing Australia's committment to biodiversity conservation, including a list of threats and proposed plans of action as outlined in the "Environment Protection and Biodiversity Conservation Act of 1999."
PBS
Nh Pbs: Nature Works: Species Diversity
If your wondering about the biodiversity of species on Earth, then check out Natureworks from New Hampshire Public Television. A brief definition is included as well as some interesting facts on species diversity.