Humus, I'm just telling it as I see it.
Remember that I said that guys like you are guinea pigs - you may discover bugs that some hotshot developer haven't discovered yet... and perhaps the IHV you informed have indeed looked at your bugs, fixes it internally and when a game developer later then tells them about this bug (which you have the distinction of discovering), this IHV tells them "Yes, we know about this, we have fixed it, it'll be in the next beta drivers...". All without acknowledging the fact that a "stranger" discovered this bug, which means this IHV is saying they know about it (discovered it) themselves. Hey, a possible scenario right?
And don't take this to mean that I'm talking about NVIDIA specifically.
Also, perhaps the fact that some of your earlier demos were featured on ATI's site a while ago may have something to do with this lack of response from NVIDIA? And that you publicly stated that you were going to join ATI? Possible reasons, no? Is NVIDIA being totally unresponsive or being paranoid or just taking a cautious stance (particularly where you're concerned)?