My own personal read on this is that McCain knows that he has a funding disadvantage with Hussein; its been like that all campaign. I think that McCain also knows that most people really begin to pay attention to elections within the last month....especially the last 2 weeks. (The political junkies like FReepers are in the minority). Also, McCain knows that Hussein is weak when it comes to the polls; he can't close the deal. In addition, he knows that the Hussein campaign has not been successful in stigmatizing McCain; he has good favorable numbers. Last but not least, he knows that Hussein has ALOT of garbage hanging around his neck that can be used.
I think the ex-navy pilot knows that if you don't have unlimited ammunition, you can't be using it liberally and early in a fight. I think that McCain is beginning to ratchet up the campaign starting just a couple of days ago. The ACORN ad is fantastic; there is more to come. Finally, while McCain is not a great debater, I believe you will see a noticeable difference in this last debate. McCain will be more aggressive and pin more things on Hussein.