I use Elmer's on things like applique and binding. I've seen a video of Sharon Schamber using it with piecing too. She used it to glue the places where pieced sections go together so that they stay perfectly aligned when sewing, said she doesn't use pins. I haven't gone that far but if I ever do something that might need it I'll give it a try.
Using it for binding is fabulous!! No pins, no wrinkling, none of that twisting look. Hand sewing binding on the back without hassling with pins is even better.