There's an article on page 26 of the October 19, 2009 Coin World about Leper Colony coins...interesting.
I took photos of a couple other Leprosy coins. This one is a 0.05 Bolivar coin from the Leprosy Nation in Venezuela. This large Leper colony was on Providencia Island in Lake Maracaibo.
Funny I should find this thread. At work we have an NGC VF35 Culion 1 Peso piece on ebay. Scarcer example as well. 1922PM. Bid is already just over $100. Fascinating stuff.