I just got my DVR-810H up and running thanks to StanSimmons.
I let it take the 7.2.0 software update, but since I had it open, I got curious and pulled the DVD-RW drive and replaced it with the NEC ND-3540A out of my PC.
It worked fine as far as playback, and its firmware version was recognized in System Information as "3540A V1.10". I didn't try burning to a DVD-R because I didn't want to waste any (I have no DVD-RW's to play with), but it did recognize a blank DVD-R correctly.
However, all of my rewritable blanks are DVD+RW. Even with the DVD+R/RW capable drive installed, it didn't recognize DVD+RW's as a valid blank media.
Are there any hacks to make it recognize DVD+R/RW as valid blank media?
Being able to support dual layer in the future would be nice as well.