Although Firewire is the future, there's some really cheap 8x SCSI burners about at the moment. I finally managed to get hold of the Firewire cable for my Freecom Traveller drive a few weeks ago and its been great. (It's only a 4x4x24 CD-RW, but the Firewire cable is a bit more secure than the USB one, and I can burn audio at 4x again ).
I'm gradually weening my B/W G3 off SCSI, with only one 9gig SCSI drive to replace internally now (I'll probably get a Sonnet Tempo UltraATA card and fill her up with a bunch of 30gig 7200 rpm ATA66 drives).