That's pretty cool, does not help my bottom line any but I plan to test it against my own system for timer reasons and cost of Cell Data for example:

Extremely useful tool to monitor sites, but be aware that it will eat a LOT of traffic (This is unavoidable of course). For example, monitoring kickstarter consume 386kb per check, doing that every 5 minutes consume 3,3GB of data in a month.

My SMS service consumes NONE of your data, does not effect your phone performance and checks once every 70 seconds.