5. The method of claim 1 , where receiving the selection of the one or more custom content groups includes: providing, to the second user, a list of available ones of the plurality of custom content groups, and receiving the selection of the one or more custom content groups from the list.
5. The method of claim 1 , where receiving the selection of the one or more custom content groups includes: providing, to the second user, a list of available ones of the plurality of custom content groups, and receiving the selection of the one or more custom content groups from the list. 8. The method of claim 5 , where providing the list of available ones of the plurality of custom content groups includes: providing a list of only those of the custom content groups that the second user is permitted to access.