Here's a new website offering some free Batiste Dry Shampoo. Just register & log into your account, then take the “Saving Time” survey. They don't ask for your mailing address when you sign up or take the survey, so BE SURE to also go to your account settings and manually add your address under My Account -> Personal Info -> Address
The survey I had to take was 15 questions long. Upon completion of the survey, they'll send you a free Batiste product in 5-6 weeks.