How to make window "stick" to desktop

[JBot]

I have a booth at an upcoming convention and I need all my computers to only show 1 window, a web page. I want to lock the possibility of them exiting out of the window, so disabling hot corners and all that are easy. But is there a way to easily lock the computer to only show one window?

 

[mrgraff]

This may help:
http://www.macusersguide.com/2009/05/configure-a-mac-kiosk/