You may be interested in this board that I have designed http://hackaday.io/project/1150-Power-Monitor. I am using an electric imp, but I believe that it could easily be configured with this board http://www.seeedstudio.com/wiki/GPRS_Shield_V2.0 . And in addition to sending an email if the temp is too high or too low I believe that this shield can push data to xively.com, but I will check that out this weekend. There is more information on my github page, and a link to the BOM on the hackaday site.
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Arduino Humidity, Temp and Amperage Monitor