Nova Star Cruises, the operator of the Portland, Maine to Yarmouth, Nova Scotia ferry have officially started accepting reservations. They also relaunched with an extensive website. One-way fares for the 10 hour crossing range from $79[recliner airline style seats] to $159[ocean view cabin] for adults. Suites are limited and are around $179 per cabin.
See our previous reports on the Nova Scotia Ferry venture: