I've been e-mailing Plextor wanting to get some info on when they're gonna release a firmware that will enable M.Rainier plus whether a future firmware update might get the drive to work with CAV instead of CLV.
I got 2 replies, thought i should share it with you people (since all of us Plextor owners are somewhat concerned about both matters - at least i am)
1st Reply (M.Rainier related)
The Mount Rainier function will be the new standard for easier use with
CD-RW, to be implemented in windows based operating systems.
Plextor will release a firmware upgrade for the units that are Mount Rainier
compatible, such as W4012TA/TU.
This will be done when the Mount Rainier standard becomes officially
released by Microsoft Corporation.
2nd Reply (CAV related)
Unfortunately, I've no information about the future.
So from what i gather, they will release a firmware that renders the drive M.Rainier ready whenever this feature is supported by MS Windows.
As far as an "upgrade" to CAV is concerned, well at least they didn't deny the possibility of this happening in the future ..