By chance I happend to watch some episodes of the travel documentary AfricaTrek on PBS where this couple walks from South Africa to Egypt. Pretty interesting so far. They're always having to deal with one obstacle or another and heat and water always seem to be an issue. Anyone else seen it? Pretty minimal gear with an interesting loadout. They use a small/med sized backback and a chest rigged butt-pack in front. Seems like it might put too much weight on the shoulders but pretty neat.

http://www.africatrekseries.com/