That would have to be Hildebeast, because without the repeal of the 22nd amendment (won't happen) Bill's signature on another pardon would not be worth the paper it's written on. A pardon for these traitors would be extremely controversial so it would probably have to come at the end of a second term of a president.
If President Bush serves two terms, these traitors might all be executed before the start of the next president's term. 2008 is a long way off, who knows which candidates will be in a positon to win that Presidential election? Hillary is 54 now, and will be 60 in 2008. If she doesn't win a presidential election by 2012, I doubt she would ever be president. Therefore I can't imagine a pardon for these traitors prior to 2017 or 2021. My guess is if they are convicted of treason and are sentenced to death, that death sentence will be carried out long before that time period.