Turns out I was searching on the wrong thing - "ranier". Correct spellling is "rainier". Found this at mt-rainier.org:
Isn't it already possible to drag and drop data to CD-RW?
Yes, packet writing applications are currently available that enable CD-RW drag and drop capability in most major operating systems. What the Mount Rainier initiative changes is that the functionality will be seamlessly integrated in the operating systems and the user will be able to write immediately to a new disc without waiting for formatting.
Will this make the packet writing applications obsolete?
Once this is fully implemented in the OS, packet writing applications will not be needed to write on Mount Rainier enabled CD-RW drives.
also found this at theregister.co.uk (an article dated 2/11/01):
Linux wins access to next-generation CDs
Updated: After months of closed-door negotiations, open source developers are now sure of royalty-free access to one of the most significant new storage formats of the future: Mount Rainier.
(the article goes on about how great & wonderful mount rainier will make RW drives. Can the ariticle really be almost 2 years old
