Just to provide a bit of insight into the "NaturalPoint perspective":
You guys are welcome to post on our forums, but we're just going to point you back to the Flight team.
The ball is 100% in their court.
We have been in contact with the Flight team for probably around 14 months. In that time, until very recently, there was never an indication that they might not implement TrackIR. They have our SDK, as well as our full technical support.
Recently I received an update from one of their software developers informing me that support might not make it into the initial release. But he also indicated that they were considering expanding device compatibility in a future update. He didn't specificy when that update will be released, or what its scope would be.
I've been in contact with him since then, and today reminded him that TrackIR is a staple in flight sims, and that MS Flight not including it would, in a sense, make history (in that no major flight title over the past many years hasn't included TrackIR). Just not the good kind of history.
In summary: we're committed to TrackIR implementation in Flight. We've provided all of the tools necessary for it to happen. We're also more than happy to provide any necessary technical support.
If any interested simmers want to influence the outcome, the best approach will be to contact the Flight team directly, and communicate the importance of TrackIR. And if you'll be witholding money until that support happens, be sure to communicate that as well.
- Seth