Here is one new shibori technique I learned: pleat a light weight piece of silk up around a rope -- the rope should be about 1" in diameter. Wrap a piece of string or thread around the silk to bind it to the rope (you end up with sort of a tube around the rope). Die with either MX dyes or acid dyes.
Here is a picture of a piece of fabric created with this technique:
Can you see the pleat lines?
Also, a great book on the subject is "Shibori" by Karen Britto.