The Dean campaign has put out a web-only ad responding the the misleading RNC ad that implies that Democrats are terrorist sympathizers. It's a bit confusing at first until you realize that the central image of the ad is a verbatim copy of the RNC ad. The Dean addition is the banner at the bottom that explains the truth behind what the RNC ad's lies.
The Dean web-ad would be improved with a header that explains this, but I applaud the effort none-the-less.
Note: this is not the ad the campaign is planning to put on TV with the money they are currently raising.