1. A method implemented in a database system for sharing data of a feed of a social networking system having a plurality of users, each user having a distinct user designator stored in the database system, and for publication of one or more social network feeds, the method comprising: receiving user input selecting at least a portion of data of a social network feed, the social network feed including a plurality of feed items configured to be stored in the database system, the social network feed accessible via the social networking system and configured to be displayed in a presentation on a display device permitting a user to interact with other users of the social networking system regarding the feed items by inputting information for incorporation to the social network feed for viewing by at least one other user, the selected data including at least a portion of one or more of the feed items; receiving, from the display device, user input identifying a person having a designated network address for receiving electronic communications, the designated network address being other than a user designator of the social networking system and being external to the social networking system, the person not being a member of the social networking system; generating a first network communication in a format other than a feed format of social network feeds of the social networking system, the first network communication including the selected data and the designated network address; sending the generated first network communication to the designated network address, wherein the first network communication is delivered, at least partly, through a communications network other than the social network feeds of the social networking system; receiving, from the designated network address, a second network communication, the second network communication being a response to the first network communication; and updating the social network feed to include data of the second network communication as one of the feed items.