Socal60, great news. Who are you gonna fly for in Dar, Coastal? Listen, I spent 10 years in Tanzania, it's a great country, a great place to live. The aviation community is very small so you're going to know everyone soon enough. No real advices to give you, everybody will be helpful. The pilots are all cool.
Just protect yourself against malaria, as for AIDS, it's like everywhere else, and probably not as bad as South Africa, even if it doesn't look that way.
Dar is very hot. The airport is big, all approaches you need are there.
Do I miss it? Yes I do, even if I am very happy to be in the US now, I miss the flying and the good life.