Below is the trailer for the 65 minute documentary, Doula! The Ultimate Birth Companion, which was launched in London on June 7, 2010. It looks really good.
The film's director/producer, Toni Harman, is hoping to get the word out about this film so that the more people who learn about doulas, the more people will hire one and have a better birth experience. If you would like to see this film, you can purchase it on Amazon, or you can visit the film's website to learn about hosting a public screening.