The technical friend explained that it would be very costly for us to try and tap into the Yvelines Numériques fiber backbone ourselves. That seems to be the message we're getting on all fronts. It's too bad. Nice network but too expensive for small-scale rollouts.
On the other hand, it sounded like he didn't rule out the possibility of a firm like his coming in and connecting into our small dark fiber network. That seems to be the way the project is evolving. Maybe the best way to move forward is to put the infrastructure in place in a way that makes it east for other operators to patch in and reach the end users. Bill WOODCOCK suggested making sure the conduit was ready and that there was space and electricity at the concentration point for other operators. I think that's excellent advice.
Any other comments, suggestions or experience welcome.