Social task lists

Providing access to task lists via social communications systems is provided. A user may expose a list authoring surface and associated task lists to other users via one or more social communications systems. When another user attempts to access contents of the list authoring surface, the user attempting access may be required to provide permissions credentials, or the attempting user's social communications account may be designated as a permissioned account from which access to the contents of the list authoring surface may be obtained. Version control management may be applied to the accessed task lists to ensure accessing users receive access to most up-to-date versions of accessed task lists. Once an accessing user obtains access to a given task list, the accessing user may comment on accessed tasks, make changes to accessed tasks and/or collaborate on accessed tasks.