In any company, startups included, you need a fellow who understands the market, does sales, and can keep the books. It helps to have a fellow who can organize things and keep folks directed. These are considered business skills rather than technology skills, though, they're not beyond most hackers to pick up. I'd suggest that the best position is where the hackers are the business guys, or visa-versa. If you're smart enough to get an MBA, you should be able to learn at least a little comp sci, and if you know comp sci, a book on marketing and finance shouldn't be beyond you.