The highly anticipated Sony Exmor R sensor made its debut in the point & shoot camera world today: Sony WX1 and Sony TX1 (the sensor is already available in the latest Sony Handycam line). The next logical step for Sony is to release the Exmor R sensor in a DSLR camera.
http://photorumors.com/2009/08/06/sony-exmor-r-sensor-now-in-digital-cameras/

The new “Exmor R” CMOS Sensor is twice as sensitive as conventional CMOS sensors thanks to back-illuminated technology that places metal wiring beneath the photo diode instead of above it. Since light is used more efficiently, you can enjoy smoother movement in action sequences and higher image quality in dark conditions such as night scenes.
http://photorumors.com/2009/07/21/next-sony-dslr-with-the-new-exmor-r-cmos-sensor/
http://www.sony.jp/products/overseas/contents/pickup/contents/avchd_hdd_hdr_xr500v/48239hd_2_1_1_exmor_r_cmos_sensor_r/index.html