cdauth’s map and its API are now called FacilMap and is available on http://facilmap.org/. I will try to keep all old URLs alive. People who want to make use of new features have to migrate their code following the guide on http://wiki.openstreetmap.org/wiki/FacilMap/API/Migration_guide_from_cdauth%E2%80%99s_map.
The OpenStreetBugs layer is now hosted on http://api.facilmap.org/osblayer/ instead of http://osm.cdauth.eu/openstreetbugs/.
ajax-proxy now runs on http://api.facilmap.org/ajax-proxy/ instead of http://osm.cdauth.eu/ajax-proxy/.