Discovered this by accident when looking for something else. Cramond and Barton Community Council obtained funding to carry out a feasibility study for reopening the foot passenger ferry at Cramond.
See page 4 of the following 'Grapevine':
http://www.cramondkirk.org.uk/grapevineseptember2010.pdf
Cycling is mentioned:
"The study concludes that the ferry is a central component of potential for tourism development in the Cramond area and is a “missing link” in the Edinburgh footpath and cycleway network."
(I'm sure we could come up with other "missing links")
There is another mention of the feasibility study on p22.