That would be a great idea. I may have to give them that idea. I know they are not happy with the site as it is now.
You submit designs by picking up the form on park. It's turned in by mid October, and designs are approved and winners announced by mid November. My roommate and her family submitted 3 designs last year, her mom won and she and her father were runners up and all three pins were made. Quite cool.
This year I submitted a design and had another idea so my little brother submitted it under his name.
I haven't done any actual trading; I've just bought all mine. I've got a lot of the limited editions because those are the coolest ones.
I would submit some designs, but I don't know how to do so. I've never been fortunate enough to go to the pin trading events.
I think SDC should set up a new section on their site where people can create accounts and check off the pins they have and how many and check off the ones they need and set up trades or something.
Joy