GeekCorps has a story about a Mali radio station that is using wifi to stream video content to TVs run on car batteries in the village of Bourem Inaly in Mali. What is particularly cool about this project is that the wi-fi antennae are all made locally by recycling local materials including cans. The only imported part is the audio/video receiver that is imported from Canada. The radio station currently has 15 subscriptions to the service that make it $45 a month.
For DIYer’s who may want to try this project, here is a copy of the project guide.
You can watch the video on the making of one the antennae here on YouTube