Correction (2/18/2008):

Jay Minkoff from First Flavor corrects the impression that the ad is actually something you straight up lick, but rather includes a tamper-proof pouch (similar to the breath strips) that one can take out and try. Though very specific, I do believe that creates a huge difference in how the product is perceived and in my opinion is far more likely to do better when people are already familiar with breath strips. Thus, these should be considered “edible ads” rather than “lickable ads.”

—–

Mmm… I am not quite sure how effective this is going to be (beyond the novelty factor) for a lickable ad to appear in magazines:

Lickable Ads