I looked at Monster.com
My husband used this several years ago when looking for a job. He posted his resume and then sat back and waited. I scoffed - this was not the way to look for a job! Even the want ads would be better! But amazingly enough he did get several good responses and interviews. And was offered a job!
It is a very easy to use site. And somewhere libaries as a profession haven't turned to much. After all we post and we get lots of applicants! But I think we are missing some of the younger crowd we want to attract. This is where they start. So we will need a presence there as well.