Yesterday, Hubbers recommended a website called Geni.com to me. It's a family tree management application. But it can be useful for so much more, because it allows quite a lot of information, such as birthdays, addresses, etc., to be entered about each person, which is only visible to the rest of the family. Remember how one of the benefits I found in Facebook was in storing your contact information in one place that is accessible by only the people you want it to be? Well, that's also a benefit of Geni.com, at least for family members. There does, also, seem to be some notion of "Friends" in Geni.com, but I hope they keep that aspect of the social networking to a minimum. I only heard about Geni.com yesterday, but I quickly filled in my immediate family (the interface is amazingly easy), and sent them all invitations to join. Most of them have already joined. My grandmother has already filled in the birth dates and places for all of my uncles, aunts, and cousins. And my second cousin once removed, Mark, the guy that sent me all the photos in my previous genealogy post, has filled in a large portion of his branch of the tree from memory, and promises to do more when he's got the actual data in front of him.
Geni.com will calculate this kind of stuff for you. I'd never be able to figure out Mark's actual relationship to me on my own.
Geni.com also claims to allow export to a standard genealogy data format called GEDCOM, which, in theory, means that the information could be transferred to another genealogy application should one wish to.
Is this not the best online profile question ever?
Plus, you can embed a reduced portion of the tree in your blog if you so desire.