> Freemium seems to be almost a necessity here. I really can't think of an alternative monetization model that makes sense.

Families may find comfort in knowing it's a paid service, since they are uploading personal photos and information. It is harder to trust something new that doesn't have a clear way of staying afloat.

>Do you have embeds? Can people embed a family video on their blog trivially from your site? Can they share it via Twitter with a click?

This might be useful for marketing. But I'd make sure your market actually use blogs and twitter to post personal family details before investing in building that.