Earlier this week our friends at Telstra released their new public SMS API to ALL developers! You can register at the API Developer portal.
Please use the event code 'BIZSPARK' when registering.
You can find more info on the program and the journey they've taken so far here. You can also expect to see Telstra making more of their APIs public in the coming months so i highly encourage you to register at the portal so you're kept in the loop.
Lots of exciting stuff happening!