The blue dress above (well, half of it anyway!) is in the new Vogue magazine and I loved it immediately. Isn't the cutout at the midriff neat? It looks like something right out of the 40s to me.
Here's a full view of the dress, which is by Carven. I'll be honest, though, I don't like the styling here. Not glam enough!
And here it is sans model, but also sans cutout. Interesting!
I love the overall silhouette and could definitely see myself wearing a similar bodice, even with the keyhole opening. I'm not really one to show my midriff too much, but this approach is quite subtle. It would be lovely in a retro rose-print cotton.