I love when I run across dresses and can totally see them as part of a wedding. The top three (j.crew, Vivienne Tam via bluefly, and j.crew) are the most untraditional, followed by two, pretty, but understated dresses (JS boutique and Kay Unger, both via Nordstrom).
These are definitely dresses that I would wear for our own wedding (for which the plans have totally changed, but more on that later). They would also make great rehearsal dinner dresses for the more traditional or formal bride.
A special thanks goes to the fiance for lovingly created this collage for my photoshop-dumb self.