There are a lot of very popular social networks which are missing in the list at http://www.geni.com/profile/edit_contact/.
Right now we can add any of these networks as Other, but then it appears in your profile with “?” sign (http://assets2.geni.com/images/contact_icons/other.gif). Why is it “?” sign? We all know what is VK.com or Odnoklassniki.ru here, so “?” sign is inappropriate at all :) Could it be the globe sign or something else?..
Or maybe it would be possible to extend the list, adding at least those social networks, which have more than 100 million users (see http://en.wikipedia.org/wiki/List_of_virtual_communities_with_more_than_100_million_active_users or http://en.wikipedia.org/wiki/List_of_social_networking_websites ordered by “Registered users”)?