Yea just your email address if you are interested in being one of the firs customers. Your email address is then given to the person who posted the service and they can follow up. You can also visit the company's website directly and signup for their service.
Basically the only thing you ask for is an email where i can be contacted to submit some feedback correct?
Does the company get my email or use an form that you provide?
I'm asking this because i always try to know where my email is going.