I'm open for suggestions of any other internet platform or medium to have a means of communication outside this forum in case of an unexpected shutdown. But using Jazz Talk is not a good idea, I think, as there always is some kind of competition between two forums.
Perhaps setting up an emergency mailing list is an alternative?
Again, no competition intended, and I only got the idea as many board members are already there. Without a clear vote from here I'd never start such a thing.