Bob - I for one would like to see the OAR retained for upconverted programming, at least for now. Truth be told I only really have the hidef receiver on when I know there's some HD content on I want to watch, but I will watch the occassional upconverted program (like when my wife forces me to watch "Survivor!" before CSI on Thursday nights.)
IMO the whole stretch thing just plain stinks. The only kind of stretching I can even tolerate is the non-linear ("natural wide" as my Elite 510 calls it) where the middle 60% of the screen retains OAR and the remaining 20% of each side is gradually stretched to fill the screen with increasing scale. It does take some getting used to, and swapping between OAR and this format will quickly make anyone realize its not perfect, but it is watchable and avoids the "burn-in" issue. Matter of fact, this is how I watch all my analog source 4:3 programming (mostly cable) to avoid burn in. Others may disagree, but I think this is the only way to go if you want to do any kind of stretch. Other than that I'd really just prefer 4:3 with side bars. Unless someone's watching 80% of their content like this than I think the need to go to grey sidebars isn't really warranted, as they are a bit more distracting than black. (My TU-HDS20 uses grey bars when set to display 4:3 material on a 16:9, this is partially the reason I went with the "natural wide" mode.)
Also, I was partially incorrect on my previous post about 'BZ-DT. Although it does map to 4-1 and identify the station call letters properly, there's no actual programming info. So maybe the PSIP is only partially working. Glad to see you got one of these, hopefully it means things may get better for me soon!