New SMS tool for Asterisk

Bayham's Asterisk SMS Gateway product is a worldwide solution for SMS messaging on the Asterisk PBX. It is a replacement for the outbound SMS functionality provided in the standard Asterisk build, delivering an efficient and low-cost way of sending text messages from an Asterisk PBX to mobile phones in 154 countries. Applications include voicemail notifications, missed call alerts, automated text receipts for callers (e.g. call reference number), system alerts, and a multitude of other uses.

In a nutshell the key features are:
- Worldwide SMS capability
- Dynamically set Sender ID to anything you like (including alphabetical strings!)
- High message throughput
- Internet based (doesn't use any valuable PRI resources)

check it out here: Asterisk SMS