I saw a great ad over the weekend. It stated that Democrat legislation is responsible for the Fannie/Freddie disaster, and cited a quote from McCain in 2005 predicting the disaster and urging reform of those entities. Then it stated that the three biggest supporters of Freddie/Fannie are Obama, Dodd, and Kerry, and that the biggest recipients of campaign contributions from Freddie/Fannie are Obama, Dodd, and Kerry!
It was terrifically effective--short, clear, and devastating. I don't know in how many states it's showing, but I hope it's nationwide!