I have been working with Magnificent Revolution for a couple of years now. They do all things pedal power related such as pedal powered sound systems, stages for festivals and cinemas. They also do loads of pedal power workshops (build your own!) and educational events. I have been working on an LED power and energy display for them (check this blog post). We got to try it out round a month or so ago at the Portobello Road Pop-Up cinema. Here is a video of the set-up process of their 20-bike generator system. The funny green thing under the screen is the power display.
The cinema was part of the In-Transit festival 2011. There are more photos (by Paul Bence) of the event and the people here.