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Yeah, I dashed that off as one of about ten things I was doing at the time. Where I was going with that was that he need bother even theoretically with the pardons only if Obama is elected. That is, there is a minuscule chance (like 0.00000001%) that Obama could do something, while there is zero chance that McCain would.
Of course, in the real world, Obama will never do anything. If he actually cared he'd have filibustered the FISA bill like he said he would. He, among all Democrats, was uniquely positioned to block the bill from going forward, and we know how that went.
Like someone mentioned, the very best we can hope for will be some consequence-free hearings, during which the only answer given will be "I do not recall".