From the "duh" file: "A quarter of U.S. employees who work with a computer admit they use it to hunt for a new job on company time"
Yes, of course it's a bad idea. But so many people hate their jobs, and browse at work, of course they're going to wander over to jobs.com or whatever. (And these are only the folks who admit it.) In fact, I'd bet for some people, part of the thrill would be to do the job search on company time - what better way to say "take this job and shove it"? Anyway, there are links to other interesting articles within this article.