Roxio has a web page titled: Toast, iTunes, Disc Burner, and iDVD Frequently-Asked Questions. In general, it offers reasons why you may want/need Toast, even if you have iTunes, Disc Burner and iDVD.
Dantz also told us that they expect to release support "soon" for the SuperDrive and the CD-RW mechanisms used on the Macs announced at Macworld Expo in July. SDAP explained In addition, Retrospect ...