The other day we reported on how you can Get Google.com in Your AdWords Display URL via a Search Engine Watch Forums thread. The results were tremendous according to abbottsys, who summarized the success of the ads as having a "conversion rate at about 3X that of a regular ad."
But Google just removed all of his ads. They cited trademark compliance issues as the reason, according to abbottsys. Why is it a trademark issue? Well, since the ad displays Google.com in the display URL, Google is a trademark of Google and thus Google doesn't like it. So his test is over.
A Google representative has not yet replied to the thread. I know they are watching, but they remain silent.
But hold your horses. abbottsys said he "discovered a variation on this ad test technique that seems to satisfy all Google trademark concerns." We don't know the actual ad test technique yet, but he said he will share soon. I will keep you posted.
Forum discussion at Search Engine Watch Forums.