Last Minute Gift Ideas: Electronic Gift Cards
If you want to make a last minute gift BEFORE Christmas Day, Amazon offers e-mailable and printable and Facebookable electronic gift cards. If there are no issues, these are delivered within minutes of purchase.
I tested e-delivery speeds on Sunday 12/23/12. Placed order at 1:20pm ET, received the order confirmation email at 1:20pm ET. Received the electronic gift card by e-mail at 1:27pm ET. The payment is under "Pending Transactions" at the credit card website. Seven minutes turn-around time. Please note however that e-delivery times may vary! I can't test this every 5 minutes :)