Are you near a college with a decent CS department? Go there. Seriously. In no other place is there such a high concentration of talented individuals who are willing to work for bargin rates. Put up some flyers, get an announcement in the departmental newsletter, and buy candidates a cup of coffee once you get a good set of potentials. Of course, there is an upper bound on the talent/quality you are going to find. But depending on the type of work you need done it could work out great.