I agree with a lot of the comments listed here. As the visionary, it is important for you to be as close to the market as possible. I've worked in Sales at a startup with an early-stage product addressing an emerging market need. At that stage, it is imperative to have agile and product-minded people "selling" the product (Mark Leslie's The Sales Learning Curve speaks to this and might be a good read for you).

Happy to chat with you more about my experience with this if it would be helpful. Feel free to email me at joel at box dot net