You can now track your family tree and watch it grow online as your family adds to their tree/network.
Geni has several impressive features, like collaborative family tree building and editing. If you add a new branch to your tree and include an email address, that person can visit your tree and build branches directly related to them. Geni is flash-based, so all of the tree-building is done dynamically with a really nice drag-drop-and-zoom interface for moving around your branches.
Check out the software here: http://www.geni.com/tree/start
Via Lifehacker