My company, Fry-IT sells a system called MOHO which is a wireless ordering system. Basically, in a restaurant, waiters walk around with a PDA instead of a notepad to take the orders. Then the orders are wirelessly beemed over to the kitchen or the till.
The restaurant show at Olympia was surprisingly big. Lots of people selling similar systems but mostly it was retailers of kitchen equipment and other restaurant equipment. Our stand was somewhat outlandish but we talked to lots of people and got many sales leads out of it. Ned Wells, our sales guy, was very happy with the outcome.
This is the first time I've ever done sales like this so to me it was a great experience.