I am not sure a web-based job board is the ultimate answer to finding good jobs or candidates.
I am coming around to the idea that what top hackers probably should do is build small firms or consultancies where (in addition to the hackers) there are a small number of "rainmakers" who have a full-time role finding appropriate projects for the firm and hackers there-in.
Now, if only I was qualified to join such a place . . .