Today I saw a bike I wouldn't have wanted to ride in a headwind (not sure I would want to ride it anywhere apart from at a show). I would have stopped to take a photo but I was late for the school pick up.
It was a normal bike that had 2 hoops attatched running from the handlebars to the rack. Then between them stretched this rainbow sail above where the person sat. It would certainly get you seen on the road, but I wouldn't want to be cycling it when there was even a small breeze - there must have been a meter or two of material.