At a glance, I didn't notice any differences between this and the calculators that have been up on Wowhead (and elsewhere) for a little while - i.e., they both reflect the current beta versions of everything. And I actually find that the Wowhead calculators run better for me (after all, talent calculators were Wowhead's original reason for being). Still, it's exciting to see these made official: a sign that the Lich King draws ever nearer. Can anyone spot a difference between the official calculators and what we already knew?
Update: Now up on the US site too (thanks, Darias).