so far these are the only dvd burners to impliment mt rainier:
1 Philips DVDR1640 firmware version MR11
DVD+RW/CD-RW drive produced by Royal Philips Electronics, The Netherlands.
2 NEC ND-2500A firmware version 1.0M
DVD+RW/CD-RW drive produced by NEC Corporation, Japan.
3 Sony DW-R56A firmware version NDT1
DVD+RW/CD-RW drive produced by Sony Corporation, Japan.
personally i am not all that enthralled with mt rainier on my 40125,48161x2, 48246, 52246 and cannot remember using it more than once on one drive to confirm that it actually worked.
since in cdrw liteon represents 3 out of 7 that they show as verified and 3 out of 11 cd/dvd combo drives (not counting their sony counterparts that are in the list) i would bet that if it is possible they will impliment it. my guess is that the blizzard of new products and constantly having to change their flashers (to keep ahead of code brothers?) has got them a bit bogged down right now. as i expect in the future that newer 8x media to be added to my 811s (and my 411s) i expect that they will add the mt rainier also.
BTW RAMON… your avatar is hypnotizing me… what exactly is it?