Glass is basically an Android device. Just create your own ADV (using android v15) with a resolution of 640x320.
You can also use the released img / boot files to create a virtual machine that works under glass, just like any other Android device (google for tuts on this).
Of course, touch / sensors / etc is a little harder to emulate / run, but they work the same as on any Android device. I put my touch code directly, and the touch immediately worked using the glass.gesturerecogniser code hosted on dev.google.
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