Similar Problem w/ FW DVD Burner...
I had the same thing happen with my Lacie Firewire DVD burner two weeks ago (running 10.3.5 at the time). All of a sudden it just wasn't there anymore. But my iPod worked fine and my Lacie Firewire External HD worked fine -- even going through the "dead" DVD burner to get to my iBook. Weird. I fooled with it for days, rebooted, ONYX'd everything, the works, still wouldn't show up anywhere. Out of frustration I took it to my local Apple dealer who plugged it in to a store Mac -- and poof there it was! So I plugged it into my computer again and poof there it was, no problems. It's been fine ever since. Not sure what was going on with it, but I hope that 10.3.6 fixes it!