http://www.quilterscache.com/L/LouisianaBlock.html
or
http://www.quilterscache.com/S/StarofVirginiaBlock.html
are probably what's I'll ask for...just have to choose which one.
On Quilterscache it shows that "one pin" means it is a basic assembly block...which is what I'm aiming for.
Pretty to look at but relatively easy to piece.
The hardest part is making sure that your fabric (11 x 18) is usable within your pattern...even if it takes some creativity.
I would have to suggest picking a block and then seeing if you can make it using your choice of fabric so you are sure of all the instructions before you send it out. If you find you need to clarify any of the instructions or cutting hints, you can share that information with your fellow makers.