I too was very interested in the new Yamaha CRW-f1. Im getting soon a new dual G4 and planned on putting a second CDRW in the second slot.
I have a Yamaha firewire 20x10x40x. there were issues I needed to clarify re toast 5.1.4 so I called Yamaha. the techs were helpful, but they pointed out: Yamaha does not support Toast, and does not support OS X.
I got the Yamaha2200fxz from J&R and they gave it to me for $10 less than the 149 price, so with the rebate, it was only 80bucks. I think toast will support it as soon as they come up with a 10.2 updater.
also, if you are copying CD's one to one, your apple burner does not go above 32x for the CD Coombo, or 24 for the superdrive.
and the laser writing is on the 'burned' side so you may not see it in a case for the F-1.
hope this helps look up the tech number on the Yamaha support page and ask them about the f-1 rotuts