Within a Sky Full of Earth

Among all the Hi5's that are flooding the cyber world, GENI is a great alternative.
If you want to keep your family connected into a network you must try it. It helps you to build up your genealogic tree with your family members and keep everybody together. The network starts from there, from blood to in law relatives, and then it can follow through each of their roots, and another root, and another, until you get an endless list of people's names that you never heard of. It's still in beta mode but can already remind you of everybody's birthday. Give it a try.