I wrote a similar article last year

Good People Are Not Good At Everything
http://www.pennyjobs.com/pp/public/Articles.aspx?aid=26

But also realize that when you start a new business – SALES – are the most important thing. What happens is that the entire team becomes part of the sales team. Everyone is involved in sales, because you are primarily selling yourselves as a competent team that will be able to deliver a good product. As the company grows, department are created and individual skills become more and more valuable.

This is why it usually takes a very skilled team to start a new business. Good and product developement and most importantly sales.

If you want to get rich by starting a business, you need to be able to sell. As an engineer, I don’t like to hear that but it’s true none the less.