Originally Posted by
SQFreak
I'm kind of curious too; I have plenty of validity left on my passport, but I'd like a passport card (people doing age verification don't need to know my address and driver's license number) in addition. Is that what you're planning to do - keep your current passport, but get a passport card in addition?
That's what many of us have done. You need a real passport book in order to travel internationally by air. However, if you have the passport book, it's only $20 to apply for the passport card. $20 for a 10-year govt-issued ID is an incredible deal!