Thanks for the suggestions on in-person surveys. I will definitely do that. I've asked various people (family, friends, friends of friends, and others I feel are potential customers), but I think it'd be a good idea to get a formal survey out there. I'll be doing that soon for sure.
Also, I really like the idea of putting another email input to sign up for future surveys. So that I can get the emails of those who are interested for launch and those who want to be a part of the process.
Seriously, thanks for the help!