I was at mom's the other day and she had her Electric Rainbow quilt on her bed. I had to take a quick pic (sorry, cell phone pic!)
It is made with all HST's and each row is staggered so the seam is in the center of the one above/below it. I do believe it was a pattern in American Patchwork and Quilting magazine. She chose a rainbow/black batik for border and backing. Pretty cool quilt I think!