We got multiple responses to our previous request. Thanks!
Foto Magazin is reporting that the D3X sensor might come from Sony (24MP - will be announced this Fall). The D3x should have the same body as the D3. The D90 will probably use the CMOS sensor from the D300 (12MP) including LiveView, sensor cleaning and Active D-Lighting. No word of video recording. I am not sure if the pictures are legit.
The full-size scan can be found @ http://www.flickr.com/photos/nikonrumors/