You see, William and Catherine's royal nuptials do benefit you. In honor of the day, Banana Republic — where Kate, aka Catherine, was spotted shopping last week — is offering a 40 percent in-store discount through May 1. For those glued to their computers, a 30% discount will be offered for online merchandise. We think this idea is just brilliant, and here are the items we've got our eye on. Just click the slideshow to see.