As you may know, Canon has just released manual control for video on the 5D. They called it, "By popular demand"
Many many D90 users want manual control for their video, including me.
1. Sign a petition here:
I already did. They need 20,000 signatures I guess. That's a lot. There's only 150 so far...
2. Email Nikon directly. Go to their support page and "Ask A Question"
I already emailed them 3 times about this, and answers are mixed every time. But in each, they say they will forward the request to the factory... who knows maybe that helps!
We just have to do it by sheer numbers! Canon did it, Panasonic did it... Nikon can do it too!