Here are the pillowcases I made to go with a quilt to be auctioned for our friends' adoption fund. You made learn more here. There's a picture of the quilt on that site.
I generally use rickrack on the pillowcases, but this time I used piping because it matched better. While it's not necessarily harder to work with than rickrack it's difficult to get it right at the edge, so you can see the stitching on the piping. I'm not totally happy with how they turned out, but I do think they are passable.