There is now an addon for this. I would change the wording in my original post. I would say that making a moderator list available in each forum is essential. A member wants help in a specific forum. Perhaps with how to use that specific forum and it's rules. Who do they ask? I often reply to unwanted conversations and emails with 'Ask a moderator'. Need an obvious list for each forum.
I would also like to see a list of all the moderators, please, on a separate page, grouped by name and by node they moderate.
In this way, the members and our supermoderators can see at a glance which moderators moderate which forums and which forums have which moderators. We have more than 50 moderators, so this would be extremely useful.