Here's a card that I made a couple of weeks ago with scrap fabrics.
This one is a good basic link:
On my blog I have tutorials for several different postcard designs:
Jessi makes hers with glue stick instead of fusible web:
This site has a ton of postcard tutorials:
Just Google "fabric postcards" or search on Pinterest. You will find hundreds!
Pillowcases! People LOVE getting custom pillowcases for gifts. Karen gave us a great demo on how to make pillowcases. If you need a little refresher here's a tutorial that I posted a while ago on how I make them. Mine aren't finished with a French seam on the inside but I think the rest of the steps are the same.