Voice RT: Control a WiFi Radio Thermostat with Speech Commands
This app enables you to voice control a WiFi-enabled Radio Thermostat, models CT-80 and CT-30.
You can change the temperature, settings, or schedule by speaking commands in English to your iPhone, iPod Touch or iPad.
Find out more information about the thermostat or purchase one at: http://www.radiothermostat.com/
Disclaimer: Continued use of GPS running in the background can dramatically decrease battery life.