Just received this announcement from Amazon at 2:16PM PST, 7/8/2015:
You can now control even more connected home devices with your voice using Amazon Echo. In addition to controlling lights and switches from Belkin WeMo and Philips Hue, Echo now supports Wink.
Wink is a home automation hub that allows you to control devices in your home. Today, we're introducing support for Wink compatible devices from GE, Leviton, and Lutron—with even more coming soon.
To get started, setup your Wink HUB and compatible devices, then connect Echo to your Wink HUB in the Echo App. Once this is complete, simply say, "Alexa, discover my devices." After Echo's confirmation, just ask:
"Alexa, turn on the stereo"
"Alexa, turn on the office light"
"Alexa, turn off the fan"
"Alexa, turn off the outdoor decorations"
Echo supports these Wink compatible products:
Leviton's Decora Plug-In Appliance Control switch
Lutron's Caseta Plug-In Lamp Dimmer
Select GE LED lights