The route is signposted from Nantes til Budapest, offers services as restaurants, accommodation. The website is only availiable in French and German.
www.eurovelo6.org

You will find updated EuroVelo 6, Atlantic - Black Sea tour offers in English here:
http://biking-europe.com/?Discover-Europe-by-bike-along-the⟨=

and in French here:
http://biking-europe.com/?Decouvrez-l-Europe-a-velo⟨=fr