9. One or more non-transitory, computer-readable storage medium comprising a plurality of instructions stored thereon that, in response to execution, cause a wearable computing device to: detect presence of a friend of a user of the wearable computing device within a predetermined proximity to the user, wherein the detecting of the presence of the friend is based on a pre-established online social networking relationship between the friend and the user; identify, in response to the detection of the presence of the friend, social information that was (i) previously published by the user on a social networking site, wherein access to the social information published on the social networking site is restricted from general public and (ii) accessible by the friend on the social networking site; generate a summary of the identified social information for display to the user, wherein to generate the summary of the identified social information comprises to highlight social information not accessed by the friend; and display, in response to the detection of the presence of the friend, the summary of the identified social information to the user.
9. One or more non-transitory, computer-readable storage medium comprising a plurality of instructions stored thereon that, in response to execution, cause a wearable computing device to: detect presence of a friend of a user of the wearable computing device within a predetermined proximity to the user, wherein the detecting of the presence of the friend is based on a pre-established online social networking relationship between the friend and the user; identify, in response to the detection of the presence of the friend, social information that was (i) previously published by the user on a social networking site, wherein access to the social information published on the social networking site is restricted from general public and (ii) accessible by the friend on the social networking site; generate a summary of the identified social information for display to the user, wherein to generate the summary of the identified social information comprises to highlight social information not accessed by the friend; and display, in response to the detection of the presence of the friend, the summary of the identified social information to the user. 10. The one or more non-transitory, computer-readable storage medium of claim 9 , wherein to identify the social information comprises to identify a pool of social networking sites used by the user.