I tried on a dress in California (at a store called Deborah's Bridal in Upland) that happened to be a private collection dress. Couldn't take pictures, and the consultant couldn't give me any information on the dress. It was a dropped waist ballgown with a sweetheart neckline and layered train (LONG train!). The consultant said the dress only came in ivory because of the material it was made out of. It definitely wasn't taffeta...I thought it looked like satin, but I could be wrong. She told me what it was, I just can't remember (I know, my fault).
There is some embellishment on the top of the bodice and at the dropped waistline. There are subtle pleats where the waistline meets the skirt.
If anyone has seen or tried on a dress like this, please let me know. I loved the dress and have had such a hard time finding anything online that even looks like it. =/