Sounds like a great idea, though I am afraid of mass texts/notifications because of how volatile bitcoin prices are.
Agreed, I get annoyed when my inbox gets spammed with crap too often. There's a nice free desktop gadget for Win7 that serves the same purpose and works well (when you're at the computer anyway):
http://domchi.cc/mybitcoins/Not to steal your thunder or anything, coinpatrol.

It's a good looking site! Maybe eventually a smartphone app to go with it that can send push notifications rather than texts?