Resurrecting an old post. I too had a surplus of cucumbers. I ended up making aguas frescas out of them (basically cucumber, lime, sugar, and water). It tastes like a hybrid of gatorade and lemonade. It is delicious. This, of course, gave me the idea of fermenting it. I could see this as kind of a hard lemonade. Get the OG around 1.06 and get to finish on the sweet side. As a table wine, this might be pretty good, too.
I may have to try this next year.