The Joys of Wireless networking - Ipaq and Wagamamma
Wagamamma is not some typically obtuse hacker but a noodle resteraunt chain based in the UK. They around ten stores in london and a few elsewhere.
They have replaced their pen and paper with Ipaqs for ordering using a WIFI connection.
The story here tells the story of a pair of hackers and what they found.
I had lunch in the WM just across the road the other day. Unfortunately neither of my cards are supported by PocketStumbler or I might have been tempted to see if they are still wide open.