In Dar es Salaam's largest market, a bustling warren of rickety stalls selling fish, spices, fruit and vegetables, nobody has heard of Bob Geldof.

Ask about the Live8 concerts and faces take on an even more perpelexed appearance it's an alien phrase that has no resonance among the sweat and dust. Around 2bn television viewers are expected to watch a galaxy of rock stars perform at concerts in London, Paris, Philadelphia, Rome, Berlin, Moscow, Johannesburg, Tokyo and elsewhere. But this global mega-event appears to have bypassed Dar es Salaam market.