We started picking up a lot of pace in the last 6 weeks. I joined a program called Startup Boost in Detroit, in which I would go every Wednesday night for a pitch and receive feedback. One thing that I didn't expect was that after every pitch 2 or 3 people from the audience raised their hands and told me they were my target customers. That's how most of our 20 beta signups happened.
At the same time, the feedback from all these different potential customers helped us accelerate product development and now we are on track to start releasing our beta next week!