A very good documentary broadcast on the BBC World Service on how Cuba has established itself on the world stage since the revolution. The second part covering the Cuban involvement in Angola in opposition to the apartheid regime in South Africa and their so called "medical diplomacy" (they have more doctors in the field that the WHO) is particularly interesting:
Part 1
http://www.bbc.co.uk/worldservice/documentaries/2008/12/081229_brand_cuba_one.shtml (http://www.bbc.co.uk/worldservice/documentaries/2008/12/081229_brand_cuba_one.shtml)
Part 2
http://www.bbc.co.uk/worldservice/documentaries/2008/12/090102_brand_cuba_two.shtml (http://www.bbc.co.uk/worldservice/documentaries/2008/12/090102_brand_cuba_two.shtml)