The Business Software Alliance -- a manufacturers watchdog group -- estimates that at any one time its staff are investigating about 900 companies for such piracy."
The BSA threatened a similiar audit of Oregon's largest school districts. In the districts' case, the message seemed to be, "buy a Microsoft perpetual licence or face an audit."
Unfortunately, it's Oregon employees who pay the price either way as employers can't take the pinch.
Here's the Portland Linux User's Group thread on the news.