Several years ago I saw quilt at Paducah made from a wedding dress. They used it as a dress, there was a bride and I think a groom. It was awesome. Wish I could figure out a way to show you a picture.
I made my wedding gown out of linen. When my first son was christened, I cut the bottom off and made his outfit out of that. I dyed the dress and wore it to his christening. I would love to make it into a quilt, but it didn't survive the fire. :(