New feature I just discovered trying to code my ESP8266 Wifi module.
First got an account @thingspeak.com.
Coded my arduino board (see my github).
Now I can follow my home temperature evolution on the net (refresh every 30 minutes).
changed on 1/1/15: code has been updated as I added an OLED screen (Adafruit OLED library) to monitor data @home (refresh every minute).