Right now, the only piece going back to Houston is JaJuan Johnson. It sounds like Lee was pretty set on Boston, but it's also worth wondering if the Wizards could have beat that trade package by offering Jordan Crawford and signing Lee to a bigger contract. Something to think about.
UPDATE: Looks like the Celtics are sending more pieces back. This is for salary reasons, meaning it may have taken more than Crawford, so it may have been too much.