For the purpose of physical drop boxes, there are much better tools than a Pi. For example this one http://wiki.openwrt.org/toh/tp-link/tl-wr703n http://wiki.op

For the purpose of physical drop boxes, there are much better tools than a Pi. For example this one http://wiki.openwrt.org/toh/tp-link/tl-wr703n http://wiki.openwrt.org/toh/tp-link/tl-wr703n is cheaper (< $20), smaller, much more power efficient, and comes with WiFi! Strip the wrapping plastic box and you can hide it practically anywhere with batteries powering it for days.