The Nikon D7000 sports a new sensor and also happens to be one of the higher resolution ones at 16.2-megapixels in the Nikon DSLR range. There have been rumors floating about that the camera uses a sensor made by Sony; well those rumors can now be put to rest. A teardown of the Nikon D7000 reveals that the Nikon camera is using a Sony IMX071 sensor. Will upcoming cameras (like the rumored D400 and D800) also feature a Sony sensor? We're guessing probably yes, but as Nikon has mentioned they would like to use their own sensors, so we'll have to see what happens.
chipworks.com - The Nikon D7000 comes equipped with a DX format (APS-C) sensor fabricated by Sony, the IMX071. With a 16.2 Mp resolution, this is the second highest resolution of any Nikon DSLR, behind the 24 Mp D3X (dpreview.com). This image sensor features a pixel size of 4.8 µm x 4.8 µm (as seen in the Bayer patterned RGB color filters). The sensor displays improvements in pixel layout and process features, as compared to previous generations of Sony DSLR sensors.
You'll want to visit the page for the pictures of the teardown.