Here's an idea, instead of building anything that moves, how about building a cheap, disposable server you can install covertly anywhere you want that automatically dials home after installed and can use WiFi or Ethernet?
You can make it look like an air freshener! No one will be the wiser. The ethernet cable is there so you can remotely check the levels of air freshener in its cartridge, of course:
http://pwnieexpress.com/
You can make it look like an air freshener! No one will be the wiser. The ethernet cable is there so you can remotely check the levels of air freshener in its cartridge, of course:
http://www.ien.com/uploadedImages/ien/IENblog/PwnPlug.jpg
Stolen power + Stolen network = Practical Path to Piracy!