I like the clean simplistic design. I also like that you have a short "privacy policy" right on the page.<p>I'd so some testing on the "Where Are You?" button because it might confuse users into thinking that they have to put where THEY are when they click that button. Maybe "Send Question" or even just "Go".<p>I don't have an iPhone so I can't test what comes up when you receive the email but the home page is really well done.