What Will Kate's Bridesmaids Wear?

Though I'm certain Kate's bridesmaids will have their dresses custom-made (by the same designer who designs Kate's wedding gown, perhaps?), this dress from the Dessy Collection definitely meets our criteria for a royal wedding. It's modest (high neckline) and chic (clean lines)—what more could a modern bridesmaid ask for?

Do you think she'll pick blue or another colour for her bridesmaids? I'd love to hear your feedback.