It's a thought...but truth be told, unless the major conferences get out of the system which determines who the NC should be, or the polls no longer have any meaning and all play is bracketed by conferences (with the winners of each conference going to the selection pool), a playoff will be counterproductive.
If a top-8 bracket were used, both Virginia Tech and Boise St. would not be in the running if it were based upon poll selection.
Nor would the Big 10 champs (Michigan) for that matter.
The whole system is inherently flawed. You have arbitrary voting to determine who the best teams are, but then a competitive system to determine who is awarded the championship. The two are incompatible, really.
At best, a poll system or selection committe would just extend the current controversy to include more teams who could have a gripe.
Instead of just Auburn having a beef with not getting to play USC, you'll have Boise St making a claim it belongs in the top 8 because of it's undefeated record, and Virginia Tech making a claim that its 10-2 record is superior to Georgia's 9-2 record by virtue of playing and winning an additional game.
However....
If conferences were dissolved (they pretty much have outlived their usefullness anyway - I think transportation has improved enough to where the need to have close regional competition is no longer there) and schedules were unlocked to allow a greater range of opponents, then a legitimate ELO rating system could be used.
If you're not familiar with an ELO rating - it's simply a system where one's rating goes up or down depending on the strength of the team you face. ELO goes up more if you beat a higher rated team, and down more if you lose to a lower rated team (and up less beating a lower rated team and down less losing to a higher rated team).
This is the system that's incorporated into Sagarin's rating system in USA Today if you're familiar with that.
A true rating system can't work, though, as long as there are "inbred" schedules. If the same 8-12 teams play the majority of their games against each other, there's no way to get a statistically valid rating in place for the whole of Div 1A.
So really, if everyone wants a playoff, the only way to get it is to start pushing for independant status or more open scheduling. Once conferences aren't controlling schedules and requiring minimum conference matches, it will be much easier to make substantial and positive changes, I think.
USA Today has a nice article on the huge cluster-f*ck that is the BCS and its controlling interests, the Major Conferences.
IRISH!