Any word on Dual-spec in WOTLK

A few months ago, we heard the rumor about having dual-specs in WOTLK. It was supposed to give us the ability to alternate between two seperate builds at no cost. I think this is a great idea, but haven't heard anything recently. Think about it-groups will be so much easier to find with this system installed.

I realize they are increasing threat for all non-tank specced builds and we shouldn't NEED to be tank specced to tank, but who wouldn't enjoy a little flexibilty?

Any status updates on this?