re surfboards--here in Montreal there is a section of the St Lawrence river with rapids, and often when we bike along a bike path that follows the river, we pass a bit where surfers play in the rollers. We have often seen surfers bike past going to the put in area with small surfboards hooked up to the sides of thier bikes, obviously the plans for a fore and aft mounting system for their boards has gotten arounds, as it works well. Boards are mounted out enough that they have room to pedal, it looks pretty neat.
These arent long surfboards, they are maybe 4-5ft long, I dunno, but it still looks pretty cool.