I like this project :). I made a similar temperature alert system with Raspberry Pi called Fido. It supports the Temper1 USB sensor and the Temperature/Humidity Pro sensor for GrovePi board that attaches to the R-Pi.
Also, I got funded today by the Knight Foundation to work on the Open Pipe Kit which should be a more modular version of Fido. The goal is to make it dead simple for anyone to send data from sensor to anywhere on the Internet.
Blog post -> http://www.knightfoundation.org/blogs/knightblog/2015/2/10/k...
Project page -> http://farmhack.net/tools/open-pipe-kit