Bruno,
my opinion is that most exit programs make your site into a popup hell and it becomes a very bad experience for the surfer.
what i would do, if you are going to use popups, is use a program like eraser cash or some other partnership program that allows you to like to it via popups. then you can control the amount of popups, and even design the popup yourself... so that it doesn't take a long time to load, or loads however and whenever you want, etc.
right now, i'm using eraser cash (
http://www.erasercash.com/wm.html?ID=9223239 ) as my popup and it works good. i don't think the small, quick loading popup is all that much of a problem to the surfers
[This message has been edited by HQ (edited 09-22-2001).]