A year ago I was put in charge of helping teach how to do a shell crochet edge on baby layettes and flannel blankets. It was the first time I had done the stitch myself and I loved it. I knew that when I had another babe, I was going to put the stitch to use on something. So I made a flannel blanket for baby brother and did the stitch around the edge.
If you'd like to learn how to do this crochet stitch, here is a good tutorial that I found: MormonChic-Crochet Edge Blanket