Would be amusing, but would still ultimately result in a Romney victory. It'd just be decided by the House instead.
Do you mean in that state? I really doubt Obama's losing this election.
If Obama wins the Electoral College, then it doesn't matter if any Romney electors are unfaithful. It only matters if Romney wins the EC by a narrow margin. It looks probable that in a narrow election (or an EC tie of 269-269) that the GOP will control the necessary 26 House delegations needed to win the Presidential vote if the election goes to Congress to decide.
Incidentally, only two of the twenty-four states that have laws designed to prevent faithless electors actually prevent those faithless votes from counting. The other twenty-two merely fine a faithless elector for breaking eir pledge. The validity of those faithless elector laws have never been put to the test.