Airport and Foot Friendly Trade Show Shoes?

Milo_Mindbender asks: "Where the heck can you find shoes that let you handle the ten or more hours a day of continuous walking computer trade shows require and won't set off the airport metal detectors? I used to go for hiking boots, but can't find a pair that don't buzz, even after I've stripped off every other particle of metal. I'm getting tired of trial and error (and blisters/sore feet when I go to CES, SIGGRAPH...etc). Does anyone have any suggestions?"