I made this dress back in November/December, but I had been thinking about making it since last winter, when I saw Erica Bunker's version here (from 2011). Erica is one of the best-dressed sewing bloggers out there, and I love her style. When I saw her version, I thought "hey, I've already got that pattern - Simplicity 2054!" In fact, I already made it (here). However, Erica's dress has faux leather sleeves and I could not figure out how I would wash something like that. So the idea kind of sat on the back burner.
Finally (over a year later -- this just shows the long, slow journey ideas in my head take before they actually materialize, IF they materialize at all) I saw some black dance knit in Joann Fabrics and thought, that's the fabric I've been looking for. The body of the dress is a gray rib-knit, also from Joann. This fabric came formed in a tube and was quite a bit narrower than regular knit fabric. But it was the right weight and is very comfortable and worked great for this dress.