MacMinute reader Jon Gales let us know that you can now send iTunes Gift Certificates purchased from the online Apple Store via the United States Postal Service. (Previously, they could only be sent via e-mail.) The new physical iTunes Gift Certificates work just like the electronic versions, allowing anyone to buy and download music from the iTunes Music Store without requiring a credit card. They can be purchased in pre-set amounts of US$10 to $200 (in increments of $10). Apple is currently offering free shipping on the certificates.