A completely free turn-by-turn navigation app, skobbler,  has just been released for the iPhone. skobbler is powered and continually updated by CloudMade which uses User made maps to keep you from getting lost. What makes this app exciting, other than the fact that it is free, is that the maps provided by CloudMade are completely user made. Users are urged by the company to make maps of their own neighborhood, which joins the OpenStreetMap community. Users using the map can (if they find a mistake), send a report to the community stating that something is amiss or they can fix it themselves; these…