Updates: Status: Fixed
Comment #1 on issue 609 by tudor.gi...@gmail.com: The Metanool UI should provide a means to add a new annotation http://code.google.com/p/moose-technology/issues/detail?id=609
Done. In the Moose-Finder you get a new tab with a pencil as an icon and there you can press on + to add a new annotation for the current entity type.
We will still have to enhance it to make it work with groups, but for now it works fine.