Even though we won't see any official computer rankings yet (and for good reason), it's interesting to look at Sagarin's rankings, one of which is used by the BCS. Here's how the top 25 look in his BCS ranking:
http://www.usatoday.com/sports/sagarin/fbt09.htm
1. Iowa
2. Boise State
3. Alabama
4. LSU
5. Virginia Tech
6. Oregon
7. Florida
8. TCU
9. USC
10. Miami-Florida
11. Georgia
12. Texas
13. Cincinnati
14. California
15. Georgia-Tech
16. Arizona
17. South Florida
18. Auburn
19. Missouri
20. Michigan
21. Houston
22. BYU
23. Ohio State
24. Florida State
25. North Carolina
Notable omissions: Oklahoma (27), Oklahoma State (26), Penn State (30), Kansas (33), Mississippi (58), Nebraska (36)