Here are some one-shoulder/asymmetrical wedding dresses I've found over the Net, for your inspiration:
1st row, from left: From the Fall 2009 collection from MoniqueLhuillier.com; Vera Wang Luxe Callalily wedding gown from VeraWangOnWeddings.com; Ivory Encrusted One Shoulder Bridal Dress from Debenhams.com.2nd row, from left: La Sposa Fatima wedding gown from SpLaSposa.com; Vineyard Style Rita wedding gown from PriscillaOfBoston.com; Sarah Danielle Style 5558 from Sarah-Danielle-Bridalwear.com.