Following the same idea as Landshare, there is a website called Hyperlocavore (http://hyperlocavore.ning.com) that connects gardners without land to landowners without gardens. It includes all of the U.S., but I don't think it has any geographical limitations.
ORIGINAL COMMENT
Following the same idea as Landshare, there is a website called Hyperlocavore (http://hyperlocavore.ning.com) that connects gardners without land to landowners without gardens. It includes all of the U.S., but I don't think it has any geographical limitations.