If you're doing any kind of crazy quilting, you can make all kinds of embellishments with thread crochet. I have a book of Christmas ornaments that includes a great fan and a few other things that if I make them in ecru will be great for on a crazy quilt, and there are tons of patterns for flowers and leaves, butterflies, dragonflies, spiders, etc that done in thread would be beautiful. And don't forget lace edging for along a seam.