Has anyone ordered from www.shabbyapple.com and do you have any reviews for them?
They have plus and maternity sizes as well as regular sizes, and they're labeled as "true to size" and "fits generously." I don't understand their sizing. Their women's large fits a waist from 42.5 to 50 inches. That's a whopper of a range. Perhaps they're adjustable in some way?
They don't have a lot of dresses that I think would be particularly flattering on my body type, but they do have some nice looking things. There are a few I might like to try, but I had some questions on the sizing so I thought I'd check here first.

