I think we should go back to having the move function move the Talk page with the subject page (or at least have that as a checkbox option on the move interface).

I don't see a compelling reason why the Talk page shouldn't move as the default.

Nor do I; having it be a checkbox option checked by default sounds good to me. I'm working in that part of the code right now anyway to help settle Mav's nerves a bit, so I'll do that while I'm there.