>I'd like to start a business in 3 or 4 years, and I'm seriously considering going out of my way to target people like him. It'll be my competitive advantage.

Count me if you can. No, not to give me a job but to be your partner. I would guess that there are some really smart older people who are under utilized because of all perceived drawback of age( often by not very smart people). But smart people are rare - there are immensely valuable whatever their age may be.