There is a new online tool to help headache and migraine sufferers. It's called Headache U
"The National Headache Foundation has developed an online tool that allows each individual to become a student of his/her own headaches and to seek and find resources that will be especially helpful, given his or her experience. "Headache U” was developed under the guidance of an advisory panel of physicians who specialize in headache care, and people with headache."
It looks like it is fairly easy to sign up for, and there is a great "The Complete Headache Chart." There is also a good section that explains aura.