Neiman Marcus also put a bunch of other work-appropriate dresses on sale, 33% off. Thought I would highlight two more:
Theory Belted Shirtdress (pictured left): in a pretty deeper blue, this shirt dress boasts roll-up sleeves like the Milly shirt dress. It is made from cotton and polyurethane, which I assume means the matching belt is faux leather, although before purchasing, I might specifically check into the material of the belt. The dress originally was $285 -- with the 33% off, it is $188.
Tory Burch Linen Dress (pictured right): this dress made entirely from linen definitely is a summer dress, especially with the white geometric print, ballerina neckline, and lack of sleeves. I would pair it with a cardigan, perhaps a darker cardigan. My favorite feature is the side-slit pockets. The dress originally was $465 -- with the 33% off, it is $307.