Not every family networking startup is trying to supplant Facebook.
Others say it's wiser to complement the site, which has more than 250
million members. "Facebook is going to kind of eat the family social
networking space," says David Sacks, founder and CEO of Geni, a site
where families can converse, construct family trees, and share photos
and birthday reminders. Geni lets its members broadcast their
activities to their general list of Facebook friends using the larger
site's Facebook Connect software.