Once supported devices are connected in their respective apps, the Amazon Echo will search for them with the command "Alexa, discover my appliances". From that point on they can be controlled by voice through "Alexa", the AI in the Echo (or "Amazon" if you've changed the AI name).
Additional Amazon Echo coverage:Amazon Echo update adds Pandora, iTunes, and Spotify voice control | Amazon Echo review: A perfect 10
According to Amazon, the following are some of the commands that will execute common smart home functions:
These appliances are currently supported for use with the Echo:
The update is rolling out now and will be pushed to the Amazon Echo. Features are being added to the Echo regularly, greatly expanding the usefulness of Amazon's gadget for the home. This will get even better once developers start producing apps with the recently announced Echo SDK.
I guess there's now a reason to buy this expensive WeMo smart coffee maker.