I've suggested this in emails to you, but thought I'd add it here to cover all the bases, and possibly get feedback from other members.  I saw a Family Map on another website I was trying out.  It was a lot of fun, and would be a potential draw for members, to get them more active.  When a member would put their address in their profile, a flag would go on a map of the world in that spot.  This is really fun for familes who are spread out, like most families using a website would be.