I've had a Pwn plug for about a year now. What a powerful tool. In this form factor social engineering will be very simple. "Hi, I'm Jake from IT and we're required to replace your power strip for compliance with electrical code and fire code. It will just take a minute." I am sure white-hats love this tool to prove to their clients how vulnerable and susceptible they really are.
Nevermind that. Deliver a box of these to any corporate office, whether they're expecting the shipment or not, they will accept and eventually distribute them within their facilities.