wow - you did such a fab job coordinating both outfits! i am in love with the sack dress! what great detail - and for only $29?!? awesome find!
i have considered wearing a white dress to weddings in the past, though i typically considered wearing it with a bright cardigan and belt. luckily, i have the same dress in hot pink, so i just swap out the potentially-offending frock and off i go!
as an upcoming bride, i can say with some certainty that i would be a bit offended if someone wore a white dress to my wedding. as ele said, some brides (me included!) would feel like it's a bit of a slap in the face. hehe, i try to keep a tight rein on my bridezilla-ness, but nobody better be wearing white on my wedding day!