zBox.com solved the problem of not-home package delivery and pickup, with weather-resistant IR-wireless crypto-locked locking boxes in 1999-2000. The USPS, UPS and Fedex driver's existing Palm-based scanners would communicate either by IRDA to the box front panel, or would display a secure unlock code to be typed into the keypad, encrypted based on current time of day, vendor, and customer. zBox had testing deals with the three top package co's, and had funding from USPS and Whirlpool. They went broke and shut down in 2001. I still have an electronics package, and a dev kit.