I just stumbled upon a great blog posted by Washington, DC area event planner, Claudia Lutman. She covers great etiquette questions like "Who will walk you down the aisle". My favourite highlight of her site- how to address the problem of cell phones ringing during ceremonies.
- Print a matching reminder card and attach it to the outside of your ceremony program
- Post a calligraphed sign on an easel at the church entrance reminding guests
- Have an usher or the officiant announce “Guests of the Bride and Groom, the ceremony is about to begin. We ask that you kindly turn off your cell phones at this time.”
She also notes that the cell phone biggest offenders are bridesmaids and groomsmen who may miss the notices, so designate someone to remind family and the bridal party.