Well, I put a panel together to be my center piece, but after finishing it, realize it's totally inappropriate! I thought a panel would be easy to just throw a bunch of borders on.
As for my center block, I think I'm going to use the one here:
http://www.quilterscache.com/C/CarpentersWheelBlock.html
I'll make it up and send it out.
Here's a picture anyway of my panel. :D I think I'll finish it up and just hang it.