Can we copy closed questions from Super User, or do you just want non-duplicative stuff.
I agree with Ivo - just copy and paste.
Don't forget we're copying questions that are already closed so there's nothing else that can be done with them at the moment.
If the site takes off and a migration path opens up then we should go through the closed questions reopening them and then reclose by voting to migrate - but only if they haven't already been copied.
This might need a reset of the vote counts though as you can only vote to close/re-open a question once each way. Unless Super User moderators aren't affected by this.
Now that a migration path from Super User is open, voting to close is on the cards - but be sensible. If you know that the question already exists here, just vote to close as off topic. Or flag for moderator attention if you don't have enough rep on SU.