Free phone calls from Primus Internet Phone as they are starting the trial:
"We are offering a special 2-week trial of the Primus Internet Phone. You’ll get 4 hours worth of FREE calls to any landline in Australia and overseas to our 15 most popular international destinations."
Trial will expire after 2-weeks or when 4 hours of talk time has been used, which ever comes first.
This is still valid as at end January 2007
Only catch is that the regular service costs $10 a month after that vs the MyNetFone service via Whirlpool as posted here which is free each month.
BUT its a great way to test out if, VOIP - Internet Phone, is to the standard suitable for you to make calls with.