You probably have a deluge of emails so I'm going to harass you from every vector :)
Hey there, my name is Joe and I want to work for you for free.
In the summer I work in the US as a skydiving instructor. In the (north american) winter I travel around, mostly to third world countries in southeast asia.
I want to volunteer and find people in need of medical care. My girlfriend is Filipino and as a native speaker we could really do some good there, as well as in other countries in the area.
I have many years of experience in the wild, the Mongolian steppe (three months on horseback), the Brazilian jungle (4 months on foot), and all of southeast asia.
I can cover all my own expenses and won't need a dime for travel or in country needs.
Let me work for you.