I worked some on another muslin from my SS'09 plan. I started off by tracing off Burda 7643 View C. This was the closest pattern I could find. I had to do a few insignificant adjustments, but there was a notable one: I made the front neckline higher and the back neckline slightly lower.
Next, I decided on the length of the first and second layer of ruffles and drafted them by cutting the front and back pattern to that length.
Due to the layers of fabric, this project required a very lightweight material. I have the options of cotton voile, silk, georgette, etc. I'm still looking for fabric but feel pretty confident I'll find something!
Also, on a side note, since we are talking about tanks, have a look at this Haute Hippie Tank. It is for sale at Nordstrom for $495! I would never pay that amount of moner, however, the idea of incorporating jewelry into the front neckline is unique and appeals to me. If I find a necklace that would work, I might try it. You can even buy a RTW tank and start from there! The only thing I don't know how to go about is how to make the big eyelets in the front straps. Does anyone know of a tool/technique they can be done with?