... when Microsoft is giving away Visa Ultimate for free.
Seriously. They are giving it, or any of the other junk they create, Office, Works, or others.
The catch? They will monitor you using it. .. It is called the Windows Feedback Program, and is available in the US only.
They must be desperate to have someone, anyone, use Vista. They do want to see how did they miss up so badly I guess. Plus this can probably save them some money from their usability labs.