I thought that too, until I got to thinking about the fraud involved in an ineligible candidate on the ballot, especially at the head of the ticket. People did not really vote for Biden VP electors, they voted for electors for the ineligible BO. Thus, even Biden's election was fraudulent, and should not be left to standing. OTOH, he'd just be VP, an office not worth a bucket of warm p*$$, according to one of it's occupants, unless the President wishes it to be otherwise. I could live with Biden as VP in a McCain administration. Sarah can then come out in 2012 and kick his a$$, if some other Dim hasn't already done so in the primary, which seems highly likely.
In that case I wouldn't be surprised to find that all electors voted for Obama or McCain except for a few votes for Ron Paul and Hillary Clinton. The presidency would then go to Ron or Hillary! The House cannot choose whomever they want, but must take a person from the top 3 (at most 3 actually) on the list of eligible candidates with electoral votes. Sheesh! Even Nader or Chuck Baldwin or Bob Barr might end up President.