Some couples connect with the audience when the audience participates, such as in the recessional.  The conclusion of your wedding should be as memorable as anything you did within it.  In wedding planning, an opportunity is audience participation.

You could also have your guests line the aisle and shower you with bird seed, a time honored tradition, or the fluttering of flower petals.  Maybe wedding at dusk would be novel with sparklers in the guest's hands.  Regardless of which accessory you choose (bubbles, petals, bells etc.) theses items should be placed on seats before the event begins.