It's not quite simple as one way - or the other. Weddle's Annual Source of Employment Survey shows a variety of online sources in the top ten ways people found their last job, including job boards, resume posting, referrals, and networking.
In fact, it's even more widespread than that because people are finding jobs in a variety of ways online. Social networking sites, including LinkedIn, MySpace, and Twitter, are helping people get hired, too.
What has worked best for you? Is job searching online effective? I'm interested in knowing how you found your last job and what you think is the best way to find a job.