[qeorge]

"Most are."

I think that's the most important point. The six point test is important, but its so vague that it can give people a false sense of safety.

From the linked NYT article:

"'If you’re a for-profit employer or you want to pursue an internship with a for-profit employer, there aren’t going to be many circumstances where you can have an internship and not be paid and still be in compliance with the law,' said Nancy J. Leppink, the acting director of the department’s wage and hour division. "

http://www.nytimes.com/2010/04/03/business/03intern.html