Stumbled on a work around once I figured out how to use adb. All the google hits about using USB for adb had me confused. Once I realized that the SDK adb is made to work over wifi I was able to install Dolphin browser. I discovered that it has a setting for landscape, and that its add-ons are loaded through the Android Market. AM pops up in landscape mode and the accept button is no longer on the bottom. Now I can install software from the AM app and I can start making good use of my Nook.
I'm convinced that this isn't a peculiar fault of my Nook and that the Android window is not set right with Touchnooter for at least some Nooks, maybe the more recent ones. Unless I can find another app that sets landscape for all apps, or that allows the window size to be customized, there are still major problems with the Touchnooter package on my Nook. Can't uninstall, for example, since the prompt button is on the very bottom. Have to rm with adb.