Hawaii's Superferry luanches this summer with ports of call at several Hawaiian islands with a travel time of about 2-4 hours between islands depending on the trip. Fares appeared reasonable even for vehicles. If you rent cars in Hawaii this may change the strategy somewhat which used to be to rent a car on the Big Island for sightseeting, and then do without one on Oahu where public transportation and hotel shuttle abound.
It's probably not a coincidence that interisland flight specials are in bloom this summer as Airlines work to compete with what will likely be a very popular ferry system.
