OSM Layers for ArcGIS

http://www.arcgis.com/home/webmap/viewer.html?webmap=b834a68d7a484c5fb473d4ba90d35e71

OSM Layers for ArcGIS

http://www.arcgis.com/home/webmap/viewer.html?webmap=b834a68d7a484c5fb473d4ba90d35e71

Alternatively *http://osm.wheregroup.com/ have a WMS OSM Server (Europe)

    Data Type: WMS Service 
WMS Server: http://osm.wheregroup.com/cgi-bin/osm_basic.xml?SERVICE=WMS&version=1.1.1&service=WMS&request=GetLegendGraphic&layer=Grenzen&format=image/png&STYLE=default&
Service Name: OSM_Basic

Default Coordinate System: GCS_WGS_1984 Datum: D_WGS_1984 Prime Meridian: 0