The current Star Trek film (which I want to see) reportedly cost $150 million to make. But what can you do with a mobile phone camera and $57 dollars? Make a beautiful 3.5 minute film about homelessness. "Mankind Is No Island" is a short film by Jason van Genderen that uses street signs and images of homeless people in Sydney and New York City to tell the story. In 2008, the film won two awards at Tropfest New York, the USA version of the world's largest short film festival. Definitely worth watching. And another way mobile phones can be powerful tools to combat homelessness.