As oracle-jutils is now able to twitt from sql, thanks to twitter exciting features, it is now possible to send SMS from your database.
Therefore, just subscribe to your database twitts and you're ready to receive alerts, messages, ... anything you like, wherever you are, and for free !
See detailed article below :
http://help.twitter.com/entries/14014-twitter-phone-faq
"Twitter and SMS: A Winning Combination
Twitter is a new kind of technology that uses multiple methods of communication to help keep you in touch with people and information you care about. Using Twitter with your phone (through SMS/text messaging) will change the feel of Twitter for you. Not only can you receive Tweets via SMS from people you subscribe to, but you can also post updates to Twitter from your phone while you're on the go. These are some of the most frequently asked questions about using Twitter via SMS."