I bought the fabric from Thai Silks, which remarkably still has some but in a different colorway. Around the time I originally bought the fabric, I also saw some at F&S Fabrics on Pico Blvd. in Los Angeles, though at a much higher price.
It took some trial and error to get the elastic shirring to work out. I wound the elastic in the bobbin thread, and after several tries, I realized that you can't use any tension when you wind the elastic thread. Also, once you've completed the rows of stitching, you have to spray the fabric with water to get it to crinkle up like that. I don't know why this is necessary, but it's MAGIC!
The fabric I used has a very busy print, and so even though my lines of stitching run about as straight as a drunk rabbit, nobody can tell. Win!
Anyway, I love this dress. It was easy to make, it looks awesome, and it's incredibly cool in hot weather. Plus, it looks good with my boots ;-)
The main reason I used such a long exposure in the first photo was to blur out any cars that might drive down the busy street, but it looks like I lucked out and didn't get any cars close up in that particular image. The other reason was that I wanted to stop the lens down enough to get starbursts out of the streetlights. That seems to have worked out well-- the aperture I used was f/11, and I like the way this lens renders starbursts. Horray for starbursts!