just found this on their website.
all online application can get $50 cashback
t&c:
Your credit card account will be credited with $50 cash back if you apply for this offer between 12/04/11 and 27/05/11 and activate your credit card account within two months of your account being approved. Only new personal liability credit card accounts opened for personal use are eligible for this offer. You will be ineligible for the $50 cash back if your account is closed, transferred or in default at any time prior to the $50 cash back being credited to your account. The $50 will be credited to your account by the 6th August 2011.
50 dollar cash back on new Low Fee credit cards - Credit Card offers - Low Fee credit card. limited time. - Commonwealth Bank Group
all online application can get $50 cashback
t&c:
Your credit card account will be credited with $50 cash back if you apply for this offer between 12/04/11 and 27/05/11 and activate your credit card account within two months of your account being approved. Only new personal liability credit card accounts opened for personal use are eligible for this offer. You will be ineligible for the $50 cash back if your account is closed, transferred or in default at any time prior to the $50 cash back being credited to your account. The $50 will be credited to your account by the 6th August 2011.
50 dollar cash back on new Low Fee credit cards - Credit Card offers - Low Fee credit card. limited time. - Commonwealth Bank Group