I'd start off by assuring people that you're not just an idea/business guy looking for code monkey to do all the technical work for 1% of the company.
That said, I have no clue where you're from but the best places to meet a potential cofounder is usually through your own friends first, friends of friends, and then everything else. Meetup.com is a good resource, eventbrite.com is another. If you're in the bay area, there are also specific events for cofounder meetups/dating. As a disclaimer, I've never done any of the cofounder meetups/dating events or anything but its worth a shot.