Side-by-side ads: an AdSense trick

There's a debate going on right now on WebmasterWorld about using side-by-side ads with different colors. Interesting trick, the idea is that you place two or more ads side-by-side so that they look like they're one ad (albeit with two or more “Ads by Google” messages) but with different colors. The idea is to draw attention to one or more of the ads.