First, let me state that my BenQ DW1620 has been the BEST 16X drive I have purchased to date. I also had a DW822A 8X drive and loved this burner also. Now for some facts !!!
BenQ really does provide many firmware updates for their DW1620 drive (B7x9). But on the other hand they neglect the EW162I (47x9) which is a DW1620 in a USB case with special firmware. The latest firmware for the EW162I is 47N9 (dated 11/04) and doesnâ€™t support Nero Quality Test correctly. This was reported to BenQ months ago by the author of Nero Speed and still no action from BenQ. I guess they are just giving up on support for their external.
The BenQ DW822A was promised to be updated to DL support and they did deliver the firmware on 01/05. But the EW822U, which is a DW822A in a USB case with special firmware, as per BenQ was never promised to be a DL drive and no firmware is coming (WTF).
To sum up, the DW1640 is available now. There has been three (3) firmware updates so far. My best guess is that except maybe for the DW1620 (internal) all firmware development for their externals has stopped. It also appears that the new Plextor 740 is a rebadged 1640. I hope Plextor will use their own modified firmware on this drive but only time will tellâ€¦