I noticed that ITWire has also come up with a new twist on interstitial ads (the ones you have to close before you can read the content). Their interstitial ad is a floating box and on my browser (Chrome) it floats to the top of the screen. In fact, it floats so high that the checkbox to close the ad is obscured. I couldn't figure out how to close the ad, so I didn't bother to read the article.