Over in the XDA forums, a couple of guys have a netflix apk that has the device check removed. Works on my phone running Reborn 2.1 and on my wife's phone running ThundeROM 1.8.3. I get the green bar at the top of the window in both instances but videos are otherwise watchable.
This seems like it might be easier than editing build.prop.
This seems like it might be easier than editing build.prop.