I assume there is no official way to get access to the context menu, so you can add a menu item when, say, you right-click on a photo in the publish service collection. You can tweak the behaviour for the two existing items, but there does not seem to be a way to add your own.
Regular menu Export, Library, Help menu items are too coarse, as they apply across the whole app. It would be nice to be able to add an item that invokes a script to do some stuff to the item.
I can hack in a workaround using the various edit collection callbacks, but this is a kludge of the highest order.
Context menu access would be nice. If squeaking helps, maybe an FR - I've already cast one, and assume Adobe only counts one per person...