Posts.  

The most immediate need is for people to make periodic posts.  Some people want to volunteer for one or two posts per month or a post per week.   

If the group gets larger, we may have to formalize a review process before ideas for posts are executed, but for right now, that process will be very informal and light.

Other Roles.

Possibly introducing new channels; videographers; editors; new ideas for security; managing this site for recruiting others; providing creative imagery and graphic design for posts; etc.