This one was my favorite link. It does a lot to describe what types of styles work with different body shapes. I particularly like the sidebar feature describing different types of clothing for different shapes. The quiz is great too.
This was helpful for figuring out body types using measurements.
A friend of mine directed me to this blog and I love it. Not only is the fashion advice fabulous, but if you click on the fruit/body shape on the sidebar, it'll lead you to all sorts of great shape-specific advice. She's also a member of the Church, so the stuff is modest. I love how she emphasizes (and re-emphasizes) that one is never supposed to accessorize their fullest assets (so if you're hippy, then low-slung belts are death, etc).
One last note: I cannot emphasize enough how important fit is. If the clothing is too bulky and baggy, then the wearer ends up looking over-sized themselves. On the other hand, if clothing is too tight, not only does the wearer end up looking a bit skanky, but they often end up looking bigger then they are as every bump and ripple is showing (eww). It's a common misunderstanding in the church that fitted = immodest. So not true. Just make sure you hit a nice balance in fit and don't end up with something too tight. Just remember, Girls, fit is everything.
Sorry, I know it's not in-depth as you might've hoped for. I didn't have a chance to delve as deeply into the subject as I would've preferred myself since I headed out of town instead of presenting. Hopefully the links provided answers at least a few of your style and body type questions! Feel free to drop me a comment if you want a more personalized answer for any of your style questions :)