Social networks provisioned to allow content to be posted for future access. In some embodiments, methods and systems for creating and defining access to future accessible posts (e.g., containing multimedia content). In certain preferred embodiments, social networks which unlock content for access or viewing by users upon the occurrence of future, but initially temporally undefined, special events (e.g., weddings of unknown dates, birthdays of unborn persons, etc.) In other preferred embodiments, network content access may be defined or granted based, in part, on future proximity to geo-tagged locations.