I signed up for Sheba Miles with Ethiopia Airlines. They haven't kicked in yet, but they are making lots of money on me this trip. I just read in the Arusha Times about fastjet.com which flies between Kilimanjaro and Zanzibar for $20. I spent $256 or so for a one way ticket next week. I am going to get a ticket to come back on fastjet.com from Dar to Kilimanjaro.
It flies a lot of places. Maybe I might fly somewhere else (smile).