BETA: AllCast and Mirror support for Fire TV
(ie, Android to Android casting and mirroring)

Sideload the AllCast receiver APK on your Fire TV:
http://download.clockworkmod.com/test/CastReceiver.apk

Then start up AllCast or Mirror on your Android. Your Fire TV should show up and be a cast/mirror target.

The receiver APK is already submitted to the Amazon App Store. Just waiting for them to approve it and go live.

Side note:
This is just a regular Android APK. You can actually use this receiver to mirror/cast to any other Android device.
Shared publiclyView activity