TwitCause is an interesting way to crowdfund. People who follow TwitCause can just retweet the cause to show support for it. Each tweet contain a link that directs people to a place where they can donate money using PayPal.

The website tracks the number of retweets and the money raised in real-time on the page, and also shows the most recent tweets about the cause.

Could this model be applied to documentary film funding? It will be interesting to see how much tweets can inspire people to donate.

http://www.experienceproject.com/twitcause