University Sells Itself During Playoffs

Exactly where is the University of Phoenix?
This was what puzzled me two and a half years ago when I stepped inside the fabulous University of Phoenix Stadium in Glendale, Ariz.
Was the university a member of the National Collegiate Athletic Association or the National Association of Intercollegiate Athletics? Did it play in Division I, II or III?
Did it have a nickname?

nytimes.com
1/16/09