The prayer shawl thing is a nice idea. I don't know what your crochet skills are, but if they are less than advanced (Like me!), you can make a quickly-worked, very open stitchy shawl in a simple stitch (such as single crochet) with a mohairy kind of yarn and a size Q hook.
I needed a pretty scarf in a hurry, so I took Jiffy Quick & Easy Mohair-Look Yarn in white, (one strand only) and worked it up in just single crochet with the Q hook. It took me a matter of minutes to wiz through the entire skein, and when it was done it looked really fluffy and airy. Just something to consider. Good luck!