The app was created by GoldRun, a startup based in New York that uses augmented reality as a marketing tools. It projects an image of Decker into the foreground of the iPhone's viewfinder. 

According to the NY Times, Mrs. Decker pops up in several poses, "and some poses — like Ms. Decker blowing a kiss to her side — seem incomplete without an object of ardor in the frame."

So put down that book and pucker up for a little augmented reality smooch. Just be warned, "GoldRun has taken steps to reduce the possibility that some may post photos of suggestive poses with Ms. Decker, which may be offensive to her and her husband, Andy Roddick, the tennis player."

bpopper at observer dot com - @benpopper