Greenpeace is using Google Maps and satellite tracking tags on endangered whales in the Southern Pacific Ocean to follow the current locations of the whales. The Great Whale Trail mashup is an interesting way for anyone to track patterns of whale migration and learn just exactly where and how far they go in a certain period of time.
This video news report by New Zealand's TV3 notes that Greenpeace, fearing that the mashup could be used as a real-time tracking system for whaling teams, are careful about how they post the information, making the current locations slightly delayed to maintain their immediate safety from boats that are hunting these whales.
Previously mentioned Greenpeace Google Maps Mashups:
Greenpeace 1 year ocean voyage map
Greenpeace New Zealand Windfarm Map
Greenpeace France GE Google Maps Censored by French Court
[Thanks to Fraser Mills and Dave Walsh for the tip!]