I fully agree that should be possible. Apologies if I didn't make that clear.

This and custom voice training for device names are on the top of my wishlist for the Echo.

For some reason my Echo has a really hard time recognizing some of the rather obvious names I give to my devices, like "LG TV". It'd be great if we could train the voice recognition engine to associate certain pronunciations with a specific device name.

The Alexa app does have a generic voice training selection...