According to the EPA testing don't most modern cars get similar mileage (stick vs. auto)? I think the main benefit of the stick shift for ecomodders is the opportunity to easily and safely coast.
I like the concept of the dual clutch auto design but I think the CVT if properly executed can provide better efficiency from an auto trans.
More info on dual clutch transmissions:
http://cars.about.com/od/thingsyoune...owDSGworks.htm
I don't have a lot of love for Ford products in general - but am impressed with that Focus!