We've used a couple of these (http://www.amazon.com/NETGEAR-XE102-Wall-Plugged-Ethernet-Bridge/dp/B0002IHP58/ref=pd_bxgy_e_text_b http://www.amazon.com/NETGEAR-

We've used a couple of these (http://www.amazon.com/NETGEAR-XE102-Wall-Plugged-Ethernet-Bridge/dp/B0002IHP58/ref=pd_bxgy_e_text_b http://www.amazon.com/NETGEAR-XE102-Wall-Plugged-Ethernet-Br...) in the past to get information out of a secure area (during a pen test). We got the idea from the same hack you mention; though as with yourself my boss cant recall any other details apart from remembering it sounded really cool at the time :D