Thanks to Geoff Tennant at ESRI UK for pointing out this OSM Whitepaper ( http://www.esriuk.com/literature/documents/OpenStreetMap%20v12.pdf ) and resources ( http://www.esriuk.com/developerhub/dh_downloads/OSM.zip ) on using OSM in an ESRI environment. Here’s the doc:
ESRI ArcGIS users should also be encouraged to provide data back to OSM. I wrote an ArcToolbox script that will convert lines and polygons to OSM ways and relations. http://users.rowan.edu/~reiser/osm/
Unfortunately the ESRI UK link is broken. Is there a chance to reupload the mxd?