"Hamm" refers to the Terraristika Reptile Show held in Hamm, Germany. Its one of the largest reptile/amphib/arachnid show held in the world. You have all of the EU represented there with just about anything you can imagine available. Its held three times a year - March, September, December.
Its a show that will blow your mind. Things you can't find in the states, you find there.
-jason p