I just read a pretty interesting press announcement for Autodesk users. You can purchase the Geospatial data from NAVTEQ for use in Autodesk products. NAVTEQ is very accurate and used in many of the auto and mobile GPS navigation solutions out there. This is not simple nor cheap Geospatial data of roads but detailed vector data for Geocoding and navigation centerlines.

http://www.adci.com/autodesk/