Without much fanfare, Apple switched the kind of DVD burner it uses as its internal SuperDrive on 17-inch iMacs, from a Pioneer drive to one made by Sony. The reason? The Sony drive supports both competing recordable DVD formats, DVD-R/RW and DVD+R/RW, while the Pioneer drive supports only DVD-R/RW. But curiously Apple has actually shut off the ability to burn in DVD+R/RW, reportedly they want to wait until their iDVD software can support both formats, rather than give an edge to companies like Roxio which already have software for Apple that can burn in both formats. Very sneaky.