For a while now, sending SMS online via Pennytel has been free ( they've been tinkering with the SMS setup and couldn't promise reliability, although local SMSs always seem to work - plus you can check the SMS history to make sure that they were sent successfully).
Free to join, and their call rates are very cheap. I used Pennytel to call home whilst overseas and never managed to use up more than $2!
Its obvious isn't it..... ! Through Buckscoop Australian consumers can freely share deals, vouchers or promo codes, bargains and freebies they think are worth mentioning. At Buckscoop you're participating in helping others to share in the good deals that you find and of course the share in those others find as well.