The Genographic Project, led by geneticist Spencer Wells is a privately-funded project established between the National Geographic Society, the giant computer company IBM and the Waitt Family Foundation.
There are 10 regional field offices around the world that collect DNA samples from indigenous populations. Also, the project allows anyone in the world to purchase a DNA self-testing kit (US$100) and send in a sample (buccal swab sample) for DNA analysis. The information obtained is placed on an internet accessible database where a person can consult (with a unique private code) the results. This reveals your ancestral history and the migratory route taken that ends up with you living where you are now.
There is also an option for you to contribute your DNA to the worldwide database. The information that is in the public domain will be published in scientific peer-reviewed journals once the project is complete