unusual flying jobs

I've been thinking a lot about taking a break from my
current career to do some flying. I have no interest
in being an airline pilot, and I know that flying is
not otherwise lucrative (or even in the airline case
for many pilots.)

I'm relatively unencumbered (no wife, kids, or mortgage),
have some savings, and am willing to accept modest remuneration
for my time -- room and board at a minimum.

I'm currently a PP-ASEL working on my IA. I'm planning
on getting multi-engine and commercial.

I have this kernel of a romantic dream of flying
around Africa for a couple of years for some relief
agency or something.

How does one go about finding this kind of work? What
do I need to do first? JAA/JAR? How much time? Where
is this kind of work posted?

Ideas and opinions are welcome.

-- dave j
--