OK, here's the concept:
Why should I clog-up my hard drive with files I want to share when I can share a CDR instead? I can also rotate the CDs to offer something different everyday.

I have a CD with 4000+ wav files on it that I certainly don't need taking up space on my hard drive. I also have CDs with a LOT more songs on them stored in the mp3 format instead of the usual 12-15 audio tracks a CD will hold. I back-up the mp3 files I collect on CD in case of a hard disk crash anyway, why not be able to share them?

I already wrote the author about adding CD drive support to future a future version of Gnotella. I invision the program storing the directory of the CD in memory, then when a person selects a file off the CD for upload, the file gets copied to a temporary directory on the hard drive until it's done with the transfer.