Not to be left out of the mobile mode trend, Zac Posen joins Prada, Armani, Juicy Couture, and Betsey Johnson in the designer cell phone game. But instead of creating a Posen cell phone - which we imagine would have crazy pleats and some sort of train - the designer's made several graphics only available to Samsung users. Fashion fans can download the images to their cell phones for instant designer wallpaper - something some stylish techies have already tried making themselves. The images will revolve every week, and come free to Samsung customers. We think the idea is brilliant, and really hope there's a week when Zac pulls images of all his celebrity clients - Gwyneth's recent Oscar dress is exactly what we want to see when we're getting a text.