Thanks, Scott, I THINK you answered my question. So, by hitting Sys Info, does it actually power-on, or does it stay "off" while showing the screen? If it actually powers up, I can fake a Power ON or OFF command using Sys Info. So, Sys Info + Power, should turn the unit off, and Sys Info + Power + Power should always turn it on. I assume that if it gets these commands during a recording that it will not actually turn the power off, which is even better.
The whole reason I care about this, is that I want a simple ON or OFF for my entire entertainment system, through my Pronto. I don't have power discrete control for my DP, so I just keep it on, while turning everything off. But this keeps the disk drive spinning as it buffers whatever channel it was last on, shortening its life. In fact, I'm starting to run into some apparant disk drive problems now on my DP. The 721 is starting to sound much more attractive now.