Have you considered letting the non-tech users post profiles of some sort as well? I can certainly see some difficulties, but it could be useful if you found a way to make it work.

Particularly, I'm thinking of people with specialized expertise or connections in a specific domain--people who know a niche, and could build a business, but need technology to make it happen and don't have the resources to just go hire a team to make it happen. Advertising to such an ill-defined demographic would be awkward at best, though.

As someone who is, for most purposes, a pure technologist, my ideal in a hypothetical cofounder (given basic things like "being able to work toegether") would be someone older, deeply familiar with some business domain populated by companies that are a bit behind the technological curve. Tech startups drive innovation in markets that tech people care about--but there's a lot of markets that get ignored, when a tech startup-style approach could seriously shake things up.