I saw this on Duchess' site too, and was smitten. Her comments about the dresses were also encouraging - how they flatter, hide, etc. all the good things.
bj - are you in Chicago area? because there are three shops in Chicago that carry the label. Click on Boutique/Bio and get past the Canadian stores. There are plenty of US stores that might have enough to get a feel for fit and sizing.
Dang, I was just in Chicago too, and had no idea!