One thing I found with using Toast in combination with iTunes...
Well, better to tell the whole story - I often like to use CD-RW so I can make a driving playlist, and I found I can actually use the Quick Erase feature in Toast, then burn straight from iTunes - despite the fact that Toast warns that Quick Erase is only for use with Toast or Jam.
Aaaanyway, when going from Toast to iTunes on my PowerMac I noticed I had to actually quit Toast before iTunes would recongnise the CD-RW...
Hope that's useful to someone!
Hob