Yesterday I did my first editing within OSM. Just some not very productive editing of some of the footpath and POIs in Kanzlerfeld. Just to try out Potlatch and JOSM. Today in the morning I saw that it worked and my editing can be seen in the Osmarender Layer of the map. The editing will probably take some more time to appear on the Mapnik layer.
I had a nice email conversation with Fröstel who helped me quite a bit to learn about editing within OSM.