While checking out a hostel in Paris their website had a link to OUIBUS, bus service from Paris, all over France and to Amsterdam with points in between. Amsterdam to Paris is a 6hr45min trip on a coach with assigned seat, free wifi and electric plug. 9 Euro with as little as a week advance purchase. Seems pretty nice and it's run by SNCF. Amsterdam to Paris by train took about the same amount of time. Paris to London, Cologne, Barcelona, Milan, all 9 Euro with short advance booking. London to Amsterdam for 7 Pounds.
I'm wondering if anyone has had experience using this coach line.