I picked up the Spring, 2008 issue of Sew Stylish at my local Barnes & Noble yesterday and was pleasantly surprised to see, on Page 19, "Design by Proportion; Figure-flattering garments are just a sketch away," which is an article on...croquis! The article includes instructions for making your own croquis and how to use it to choose patterns that will be flattering to your figure.
The actual text portion of the article is quite short, just 2/3 of a page (and part of that is a rather large headline), but the remainder of the article is lot of pictures showing how make your own croquis and how to use it to try out different silhouettes on your body shape. The illustrations include detailed captions.
If you have considered making your own croquis, I highly recommend picking up a copy of this magazine to help you get started.