>I am starting a project which seeks to give destitute South Africans
>an income through the use of eco-friendly technologies. I'm currently
>researching the viability of using a bicycle fitted with a pedal
>powered blender to make Eco-Smoothies (fruit shakes) along our
>bustling beaches.
For commercial use, I imagine you'd want a Waring.
http://www.comforthouse.com/comfort/blenwartailb.html
There are plenty of ways to get 12VDC from leg (and solar)
power. 'course you'll probably also want to use a battery.
That would allow the operator to pedal when there isn't any
business, and then stop to make the smoothies at full power.
--kyler