Hi
btc-alerts.com is a new service offering user-configurable alerts on bitcoin price changes.
Alerts are delivered immediately to your mobile phone in an SMS message, as soon as the mtgox price crosses your chosen amount.
We will be launching very soon, but you can register your interest now to be notified when the service goes live, and for access to our private beta test.
Feel free to post any comments/questions here and we will do our best to answer.
The Btc-alerts team