At Anime USA (November 18-20 in Tyson's Corner, Virginia) there is going to be a One Piece Panel. The person who runs it is looking for suggestions. I cannot guarantee that they will be used, particularly since this thread is going up a lot later than I had wanted it to. But If you have any ideas, feel free to post them.
Also, is anyone GOING to this convention? I will be there as Nami (of course) among other things, and I MIGHT be in Opening Ceremonies. Madgopher/Monty will be there as Sanji and who knows what else. We're trying to put together another of our notorious cosplay skits…but we'll see. Be sure to say hi if you see us!