from the mt ranier site :
Which rewritable drives are EasyWrite qualified?
To see which CD-RW and DVD+RW recorders have passed the EasyWrite validation tests, click on search below, select Mount Rainier Drive from the drop-down menu and press .
i see no currently certified dvd recording drives on their list. i would assume this is due to the standard being an evolving one. it ONLY lists dvd+rw as a supported format so it may not even support -rw
as for adding it with a firmware i would suppose it is possible. that is what they did with the cdrw drives.
as far as their intentions i have no idea but i suppose it would be a good thing if they want to be compatible with longhorn but that is a LONG way away maybe even 2006 so relax