Rates very dramatically based on location, service approach, and skills required.
When I was a freelance consulting for about 2 years before working where I do now. When I was freelancing I charged between $50-75/hr as I had only 1-2 years experience. I would say in the US rates around $75-125 are common for basic services and up to $200/hr for advanced services. Really just depends on the company, the person, and the process.
[edited by: tedster at 2:24 am (utc) on Mar. 1, 2009]