You know what? Item trading would be brilliant idea for Diamond and Pearl. I dunno about you, but I'm tired of trading items one by one. Instead of trading a pokemon with the item, they should set them up to be traded seperately. What do you think?
It'd be something interesting on the side and I'm sure it wouldn't be hard to implement it into the game design. Even if it wasn't used a hell of a lot, it would take up much space and would be nice to have.