Microsoft ad agency confirms: New Seinfeld ad produced, yet not runningThe doublespeak coming from Microsoft and its ad agency, Crispin Porter & Bogusky, in the wake of its "icebreaker" ad campaign featuring Bill Gates and Jerry Seinfeld, is amazing. Yesterday, Valleywag learned that Microsoft PR was revving up a spin campaign to go along with the ad campaign. Its aim: To make sure no one interpreted its shift to a series of anti-Mac ads as an abandonment of the Seinfeld spots. But Crispin Porter tells Gizmodo that it did, indeed, have another Seinfeld and Gates spot already produced. It's just not scheduled to air. Anytime. As of yet. It could air. Some day. If Microsoft wants it too. So does this mean Seinfeld will return? As a Microsoft flack told us yesterday, "possibly" and "potentially."