Well, if you have Computer Craft (or presumably Open Computers) you can get redstone out of the game and send an SMS:
https://boomtree.com/r2p
I made that. But just this week LittleBits released a Minecraft mod called "bitCraft" that lets you use their CloudBit to simplify all these steps even further:
http://discuss.littlebits.cc/t/bitcraft-our-minecraft-mod-is...