The Toughbook people. Kiosk folk have done such for years as well.
Bob
I'm putting together a touch-screen terminal for a children's museum. This thing is going to need to endure years of small children coming and smacking it as hard as their tiny little hands can manage. They might also get all sorts of mess and bodily fluids on it, that's just how kids are.
What I'm wondering is, should I use a normal touch-screen monitor, or are there touch-screens that have been designed to be more durable? If so, is there any information out there about just how much more durable they are, and just what sort of abuse they can and cannot survive?
I've tried googling around for this, but either I'm not using the right key words, or this information isn't easily locatable on the web...

Chowhound
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Giant Bomb
TechRepublic