In the Oct 2011 issue, in an article titled "Energy savings (for real)":
What works: A home energy audit can identify low-tech, high-yield energy retrofits. Your utility or state energy office might offer low-cost audits. But be sure they're using pros certified by the Building Performance Institute or the Residential Energy Services Network. They undergo classroom and hands-on field training in whole-house energy audits, and continuing education requirements ensure that they keep up with the latest practices and technologies. Expect to pay between $300 and $800 for a complete audit......
Note that Consumers Reports does not allow using its findings in your advertising, but it sure is great to know they are informing homeowners of the service.