I'm considering testing exit popups (or lightboxes) for some of our sales pages.
Here's some examples I found:
Dialogue, on window close: The Ultimate Exit Popup Has Arrived!
CSS Lightbox, on mouse to top right: ExPop: Unblockable DHTML Exit Popups (Hover Ads)
(both commercial scripts -- not aff links -- though I'll probably just write my own).
What type of exit popups do you use, and where? Have you found any types more successful in different browsers, or even in different markets? I'm looking to reduce user frustration as much as possible. Appreciate any feedback and suggestions.