For future reference, the Illinois Attorney General site has some information on common complaints/scams, and there's contact information where your friend can register a complaint.
http://www.illinoisattorneygeneral.gov/consumers/index.html
If you click on the link for "General Consumer Issues and Information on Common Scams" you'll find PDFs on employment scams and work at home scams.
People could also contact the consumer office of the Attorney General if they have questions about a specific company or possible scam. (chicago area # is 800-386-5438)