Check out this article by Pat Utley, Director of Greenheart with the latest on their design for a 60 tonne capable sail/solar pax/cargo vessel. The sooner we can get ships like this operating in the Pacific the better.
http://www.greenport.com/features101/marine-civils/technology/greenheart...
Greenheart Concept design

There's a link on our Links page to the Greenheart website