Good luck with your drive! Keep posting information about it. It's the only way to create a database - someone has to start it.
Regarding my drive the Pioneer DVR-K16, it was built on Feb 2006 according to the label on the top, hence is very new. Only programs made after or aroud that date have a good chance to recognize it.
As I said in my post above, no burning program that I already had was capable to burn DVDs on my Pioneer DVR-K16. So, I downloaded and installed "Deepburner" (listed at the "free software thread here"). It worked fine burning one DVD-R (4.7 Gb). Now, I'm going to try a regular CD-R (700Mb).
Also I experimented a bit of a hissing noise when playing anything that had audio (either a .avi, .wav, or cd-audios) on the cd-audio channel. I don't have an idea exactly why, but it never happened with my then-working Toshiba drive. Perhaps somebody can help increase the knowledge there. To avoid the noise, I just muted such channel; it's a workaround, but because all my cd audios do rip well to mp3s (I just tested, Audiograbber), hence no problem :).