The pillowcase bag is famous.

Craft Gossip featured my reusable pillowcase shopping bag tutorial on its blog the other day.  Take a look! If you've never visited Craft Gossip and you're feeling crafty, I highly encourage you to take a stop over there.  They cull all of the best craft ideas from around the web - and there are hundreds and thousands of them - and put them together under one blog header.  You'll love it!