I use a Jomsocial 1.8.x hack/plugin that allows admins in frontend to transfer a jomsocial image from useralbums direct to the appropriate Joomgallery category. the admins are able to add/select a Title,Description and Categorie within a seperate form.
This Hack must now be upgraded to latest:
Joomla [url removed, login to view]
you must also fix the following issues:
* Transfer not possible if Jomsocial Amazon S3 is enabled for Photos
* Thumbnail size for transfered photos should respect the default Joomgallery Thumb size
* Activity stream support (worked with 1.8)
* User points support (worked with 1.8)
if you are able to create from this hack a plugin for jomsocial then you are my favorite developer.
you get the latest 1.8 version from this hack as zip file with a pdf description how it works.