I just had dinner with a job-seeking friend lamenting the number of jobs listed in the local paper. It seems someone may be missing out on three-quarters of all available jobs: LinkedIn. (He confirmed he's on LinkedIn, in case anyone is concerned.)
Nonetheless, some great statistics substantiating the power of LinkedIn for job seekers and recruiters (of course 97% of them are on LinkedIn, so I suppose that goes without saying). Let me know what you think about this one, and pass it on to your job-seeking friends!