Not related to your cousin, but if you want to extend your tree back a bit further, you can get your lineage traced from your DNA and be part of the
genographic project. It's $100, but it looks really cool and it's run by national geographic.
Introduction to the project
http://www5.nationalgeographic.com/g...hic/index.html
Getting your own lineage mapped
http://www5.nationalgeographic.com/g...c/journey.html