Another unusual "yarn" at work...
crocheted rope basket: http://makingchickensalad.com/2010/02/tutorial-crocheted-rope-basket.html
I just 3/4 made a belt for DD from nylon string by crocheting a foundation DC chain. It just needs a couple 1 to 1.5 inch rings for fasteners.
That sounds interesting. Sort of
I've done macreme. It's pretty cool but crochet is faster.
Pictures, maybe eventually.