Just got hold of one of these - great little device.
The issue I'm having initially is that I when I power on or select my Shield activity, it brings up the inbuilt Android menu on my TV. I think this might be related to the fact that pressing 'Menu' on my Harmony remote has the same affect. Maybe 'Home' is the command being sent to wake up the Shield, and my TV understands the same command?
Has anyone else come across this? Is there a workaround?