There are plenty of qualified people here looking for work, whether it be temporary or long-term. I myself am looking for work for instance.
Before looking into paid job boards, post in the "Who's Hiring" threads that go up each month or contact posters in the "Looking for Work" threads.
How many people are you looking to hire at once, just one or an entire team?
I also agree with phyllotaxis, you need to decide and advertise what type of developers you're looking for. Do you want a co-founder to take over the technical side for you, or do you just want code monkeys that can fix bugs, or somewhere in between?