Huh, you can sell a product while it's still in beta? Of course. In fact, you can sell a product that is still in prototype. And I'm not talking about selling it to an investor, but selling it to your target customer. Heck, with a few enticing screenshots you could probably sell it in the conceptual stage. It all has to do with these three principals: how strong is your vision for the product (how much you believe in it), how well you can articulate the advantages (how detailed is your vision), and how easy you can make it for your prospective customer to make a buying decision (how good you are at selling).

These core principals combined will together form your…sales pitch. Yes: this is all about selling. And I know many of the software programmers & designers out there will cringe at the thought of having to sell an incomplete product. But once you understand that people aren't buying your product - it becomes easy. People are buying YOU. They are excited about YOUR vision and how it can help them. They trust you because of your unshakeable belief in that the product will do what you says it does (or eventually will do).