[Bunnyhop]

As others have said it's all a matter of determining the patterns ad blockers use to find ways around them...for example a while back I figured out how to get around the google toolbar popup blocking (it probably gets around other blockers as well but I haven't tested). I also did manage to get around the zonealarm blocks but their more recent versions have thwarted that and I haven't taken the time to get around the new protection.

The only real blockers that will be 100% successful are ones embedded directly into the browser (for example mozilla's blocker) since they can effectively prevent any form of window popups regardless of how the popup is called (which can get really annoying for sites that use mini popup windows to display help information). The one thing you need to rememer is there's more than one way to open up a window...it may require some crawling through the sludge of HTML syntax and javascript calls but there's quite a few methods beyond the basic popup methods.

Scrolling ads work as well and haven't been stopped by any ad blocker I've seen yet....but they're not popup windows and may not meet what you're wanting.