I started wondering yesterday afternoon what rippled thread crochet would look like. So, I sat down during Amazing Race last night, and voila! I have a rippled bookmark. I'm trying to decide whether it needs a touch of narrow ribbon through the center two DC rows. This is #10 thread with a size 4 hook.
I've also made some progress with my ripple. It's amazing to watch it grow, and see how it changes as I add a new color. I chose the colors based on a strand of the Flower Power and, of course, that even looked different once it was crocheted in the pattern. But, it all seems to be flowing together now.