I found some very good news at VersionTracker. There's an app called Mac OS X SCSI CD-RW Helper that finally lets us burn CD's with our favorite SCSI drive in OS X. It works with Toast Titanium 5.1PR2 (and it looks like iTunes2 as well, but I haven't tested it yet).
This is what the people who wrote it have to say about it:
"The Mac OS X SCSI CD-RW Helper fixes a minor bug in Apple's driver for devices that support the MMC standard (Multi Media Command set). Virtually all CD-RW drives shipped in the last three years support some flavor of the MMC standard."
Mac OS X Hints
http://hints.macworld.com/article.php?story=20011114080643624