GTP I first became aware of JSF (think it was called JAST at first) back in 1995 from Flight International in a local libary. Even back then the STOVL version was linked to the RN as well as the USMC.
I think manpower considerations do need to be taken into account in selecting equipment.
In the June 2005 edition of Air Forces Monthly had an article on UK Future Maritime Airpower by James S Bosbotinos. He claims that Lockheed Martin are/were studying a possible two seat version of the F35B for electronic attack.