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The Helpdesk Institute - http://www.thinkhdi.com/
offers training and certification for this.
If you want to take it one step further, consider whether it would make sense to require IT professionals to be licensed like physicians or attorneys. There was an article a few years ago in our legal office whether IT professionals should be required to carry malpractice insurance for dispensing bad advice. I believe the quote is be careful what you wish for.