I flew home from SF yesterday and realized that there was no way (short of installing a very crashy Settings.apk) to enable Airplane Mode on my Glass.
That seemed like a reasonable enough "small" starter project.
This is really, really only for folks who are already comfortable running third party apps on their Glass. If you don't know how to sideload apps with adb, please don't install this.
You can grab the initial build at:
Source lives at https://github.com/obra/GlassAirplane