Treato.com until I received an email from them through this blog. I checked it out and it's pretty neat! If you want to find out what people are saying about certain medications or conditions (like migraines), do a search and the results are posts from forums all over the internet. You can even combine the two; I searched "5-HTP migraines" and found that I'm not the only person trying out 5-HTP for migraines, and I was able to read through what other people have been writing about in web forums.
Treato has more than 1,000,000 posts on headaches and 326,000 posts on migraines. I hope this will be a helpful resource for you. (Oh and the intro video's cute too!)
Happy Halloween!!! :)