Haven't heard anything from Ford on that angle but there have been a few people here (like yourself) bring up the idea.

Personally, the technology isn't as great as some would have you believe. Our GM has it and it's in V4 mode so little that it can't possibly provide more than 1MPG- and I really doubt it's that much. Given the cost of the technology to implement deactivation, it just doesn't seem worth it to me.