J.Crew has an amazing selection of beautiful [wear again] bridesmaid and MOH dresses.
Each season they offer similar dress styles in new colours. The upcoming Spring 2009 swatches are beautiful.
Angie and Steph, take note: "Spiced Wine" looks like it could be an elegant eggplant for your bridal party.
There are so many flattering styles and beautiful designs to choose from. They can all be found here.