100% of my placements have come, and will continue to come, from a job board. It is an extremely effective tool if managed properly!
But it's more than the job board at issue here. I have found candidates that some may consider to be "diamonds in the rough." Well, what are the "diamonds" doing on my job board? They are doing exactly what has already been expressed here! They are using every tool available to them, from face to face networking to online job boards. People understand that there are very effective tools available online, and a job board is one of them. They also want to know that you, as their recruiter, care enough to work with them to give them the best chance possible at getting in front of the hiring manager.
If my job boarding experiences bring me "diamonds," then I can only hope for more "rough."
My belief is that job boards had their 15 minutes of fame.
Huh! If that is the case, then why are they so expensive, and why do they still work, and why does most everyone post their resumes to them if they are so "last year????" I'm tired of how a lot of recruiters from all walks of search pooh-pooh job boards when we all use them and will still use them regardless of how sexy we all believe the "new" channels are. Like a lot of you have stated, job boards are just another source, albeit a rather important source. If you compare the overall hiring source codes from job boards against social networking sites, I'd think we'd not be surprised how job boards still dominate our hiring statistics. It's just a fact!