Build a relationship with a target audience first. Now that you’ve got their attention and loyalty, post job opportunities in front of them?

In a kind of reverse engineering, successful niche blogs are launching revenue-producing job board add-ons. A Red Herring magazine article cites GigaOm, the blogging network started by former Business 2.0 writer Om Malik, as the fifth niche job site to come from a blogger. It also references job boards from blogs TechCrunch (with the catchy job site name CrunchBoard), 37 Signals, Alarm:Clock, and Paid Content. Doubtless, there are more…or will be.

As the lines blur between direct and indirect sourcing methods, the fight is on for a minute – no, for moments – of mindshare from potential candidates with like minds. Similar to contextually placed paid ads in search engines, all audiences are fair game.