You should work out whether you are a better engineer or business person and search based on what's not covered.
EG: It would suck if you are a great engineer, and ended up with an ok engineer co-founder doing the engineering whilst leaving you with the business stuff (which might not be your forte). You could have had a better engineer (you) and a better business person (someone who is just business).
At a higher level, I wouldn't even look for a business orientated co-founder. Just get another developer, or if it's appropriate, someone who is more design and product focused. The business can take care of itself through advisors and just picking stuff up yourself.
