The Keyless Locking Mailbox was designed to do the same thing as all the security measures you've implemented on your computer: keep miscreants from getting hold of your personal details and stealing your identity. It requires you to enter a 4-digit PIN number on a keypad to retrieve your mail, and an angled slot lets the postman makes deliveries but keeps sticky fingers out. The box comes in black or white for $300.
Keyless Locking Mailbox [Ubergizmo]
