James Surowiecki posts in Some Excellent Debunking:

You know that $700 billion that John McCain and Barack Obama say we’re sending to ‘tyrants and dictators’ because of our dependence on foreign oil? It doesn’t exist. In fact, it appears that Boone Pickens made it up.

This is one of the better pieces of debunking I’ve seen lately. This figure is tossed around everywhere and it’s fictitious.