Wow! Someone has created a whole website on sleeping in airports....
(Compare to my own blog entry: How to Sleep at an Airport)
It's almost TOO MUCH information! It also seems to be a labor of love, since it's hard to see a site like this making any money. (Travelers who sleep in airports don't have much discretionary income so probably won't attract much advertising.)
I'm just a little concerned about airport sleeping getting out of hand. Any form of Free Sleeping only works if you keep a low profile. If the phenomenon starts going mainstream, then the airports may begin developing countermeasures. However, this website has been around for over ten years and hasn't seemed to have changed the landscape any.
I'm mainly surprised that such a website exists. Bravo!