I went through a layoff a year ago. Got a bunch of resume books and most of them said to avoid the internet. The funny part is, every prospective job, as well as the job I finally took, were offers I got through on-line postings.
There were probably twenty internet postings for every word-of-mouth or newspaper listing. It's just the direction things are going.
The down side is that I've found people seem to treat internet communication with far less professionalism. I'd get responses from multi-national companies that said stuff like:
"so when cab you come in for an interview. thx. julie"
Make sure you keep your professional face on even if they don't.
-John
