Here is a short list of useful internet sites, covering college football reference data, national media, official NCAA and NAIA pages, conference and division pages, rating systems and comparisons.
Reference
Sports Illustrated College Football
CBS Sports.com College Football
Rating sites
Official NCAA and NAIA pages
The National Collegiate Athletic Association - Football
National Association of Intercollegiate Athletics (NAIA) - Football
Conferences and Divisions
Ratings Lists and Comparisons
Wilson's American College Football - Ratings List
Massey's College Football Ranking Comparison