Zulu, are you a Saffa? I can't help but wonder with your screenname and all. ;)

That sounds like a trip of a lifetime, but considering how spotty infrastructure will become once you leave Egypt and until you reach South Africa, it would be one wild, unpredictable trip. I have been to most of the places along the route and they are all great in their own way, but I would not be brave enough to drive through Zim on a bike that is for sure.