Apple Adopts Sony Superdrive?
I just purchased a new 1.0 GHz iMac from an Apple store yesterday. To my surprise the Apple System Profiler reported that the DVD drive was not a Pioneer drive, but instead is a Sony DVD RW DW-U10A. Apparently this is a DVD-R, DVD-RW, DVD+R, and DVD+RW drive. I had not been aware that Apple changed DVD drive hardware venders.
Apple has previously used a Pioneer drive in the past (for their "Superdrive"), which was limited to DVD-R and DVD-RW formats.
This MacRumors.com thread discusses the switch and confirms that the new iMacs use a Sony drive.
Addendum: Some users report that their new iMacs still use the Pioneer drives, so it does not appear to be implemented across the line.