We've just spoken with a Microsoft representative, who has informed us that Voice Control for Kinect will definitely be available "by the end of the year." But as of now they have no more specifics with regards to precisely when that will be.
We will be speaking further with Microsoft about the issue - hopefully this afternoon. So we're hoping to get more specific details on the date, and possibly some answers with regards to why the update has taken so long.
More news as we get it.