J M, I understand your frustration. However, I believe there was some miscommunication or misunderstanding in your support call.
When I tried to call, they said they couldn't help me over the phone unless I shelled out $50.
This isn't correct. Your PowerBook is apparently under the one year hardware warranty that comes with all new Macs*. In that case, after the first 90 days your free phone support for
all hardware and software problems expires, but you do still have free support for the rest of the year for any warranted hardware problem. That includes phone support for those problems.
The $49 they mention is not a charge for service. It is a per-incident fee that you would be charged
if the problem you're having is not a warranted hardware problem. They will take your credit card number in case they need to charge you for such support. If your issue is covered under warranty, which a nonfunctional SuperDrive will be as long as it's not caused by accidental damage (such as dropping the PowerBook), then any service required to get the SuperDrive functioning will be completely free, including the support phone call and any shipping.
For more details, see
Is phone support and warranty service free?
*I'm assuming your PowerBook is still under the first year of warranty because if it weren't, as far as I know, Apple Support wouldn't even offer the $49 per incident service.