I like and agree with the post except the job board and ATS graveyard comment.
Everything in our (recruiters, sourcers, talent acqusition specialists, headhunter, whatever title you go by etc.) arsenal has it's place: university recruitment, job boards, ATS systems, etc.. As we globally compete to hire the "best of the best" (quote from the movie The Men in Black) for our customers, clients, etc. we need to look at the process like a doctor selecting the right prescription for his patient. The position profile (the ideal candidate ask questions and understand the job experience, education and attributes desired before sourcing) to determine what means to use when to locate the "ideal candidate". I agree with Jerome in LinkedIN is the place to go as a sourcer -- it's great for unfamilar searches -- it educates you not only on the candidate pool but adds keywords for utilization in additional searches like: Careerbuilder boolean searches and the creation of resume alerts, our Monsters resume search agents and College's/Univeisities where the talent was congealed, but LinkedIN is not a resume depository; it is a sourcing tool and generates leads like a muse, for further exploration, by reviewing the profiles it gets those synapters firing on where recruiters can find the "best and the brightest" as well as serving as a secondary referral source to the candidate we hire.
Dog owners / lovers...do you get rid of your old dog and buy a new one everytime your neighbor or friends show you their cute, smarter or faster versions of "man's best friend"?... No, you keep your best friend and play with the neighbors and enjoy them for the short time you see the new friend. Why? Because a dog's a dog, you've raised, trained, you know your dog and it listens to you and hopefully you like your dog. I like my iCIMS ATS and for now see no reason abandoning my best friend -- but I am planning on using LinkedIN while it's "HOT" who wouldn't?