Much of the reason why it's insanely hard to find a really good technical cofounder is that the best ones really don't need you. Or at least they don't think they need you.
They are not the code monkey. You are the biz monkey.
Another point: you probably want some assurance (in the form of past achievements) that your technical cofounder will be able to deliver the technology. Technically gifted people will want the same assurance with respect to your business skills. "I sold my previous business for $5m after 2 years" will get even the most independent geek's attention.
Andrew Chen provides a number of other tips for non-technical founders, such as, for example, building a less technological business first to prove your mettle, and understanding and communicating what you will bring to the table.