I'm not seeing MoneyPak as a payment option! Would I choose Prepaid Debit Card?
On their website today
"News:
Update 10/20/2011: We're working on adding instant payment via MoneyPak, so that customers can enter their MoneyPak number on get-bitcoin.com and have payment confirmed on the spot. While we're setting this up, we must unfortunately disable MoneyPak orders for the next week. We greatly apologize for the inconvenience. All orders up to #1,072 have been confirmed and processed as usual."
So currently you do have to mail them, but in one week you could just enter it online. During this time they stopped taking moneypaks.