We mentioned the Pen or PIN program in Australia earlier today. The Pen or PIN website includes several resources explaining what's happening including a general backgrounder, one for retailers, another for cardholders, and an FAQ for media. "From 4 June 2008, most American Express, Diners Club, MasterCard and Visa cardholders will have the choice to use a Personal Identification Number (PIN) to authorise transactions when using these cards in person. The introduction of PIN on these cards follows an industry-wide collaboration involving all major banks, financial institutions and card schemes operating in Australia."

The Sydney Morning Herald reports on the "Pen or PIN" project underway in Australia that will allow shoppers using credit cards to either sign their receipts as they've always done or choose to use a PIN instead beginning June 4. A spokesman said: 'The introduction of PIN on credit and debit cards will give cardholders a quick and easy alternative to signature authorisation when making purchases in person.' Meanwhile, the Herald Sun reports that a consumer group is concerned that a move to PINs 'could result in consumers being unable to dispute credit charges.' More details here.