Thanks a lot Birgit for the information about Tulcea-Sulina-Sfantu Gheorghe Road&Boat connections.
Indeed also myself I'm planning the same route as yours from Odessa to Galati, so when you come back please don't forget to post a message about your trip.
As far as I'm concerned I've already traveled the last summer from Le Croisic (Loire Atlantique) to Budapest and so the next step is by the way to complete the Atlantic to Black Sea route.
Of course, hope to hear from you again.
Ciao.
Corrado