I am also working with the most amazing fabric. I purchased it at Gorgeous Fabrics. I normally am not drawn to orange, however I think the color combination is unique and is going to make a beautiful blouse. The fabric is a cotton lawn. It's very sheer, but not "see through" with the proper undergarments, and oh my goodness it is so soft and drapey. I have two solid color fabrics that will go nicely with it (a linen and denim) and I will probably make a skirt out of one and possibly dressier shorts or capris with the other.
Here is the fabric and how far I've gotten with Butterick 5365, view A. I am taking my time making this. I have used french seams on the shoulders, sleeves and sides and Pro-Sheer Elegance Interfacing from Fashion Sewing Supply for the collar, band and front facing. I love this interfacing. The drape of the fabric is still intact after application.
Here is a glimpse of the collar and shoulder tucks: