Yes! Carter! Not only a former president who is revered as a great success, but also one to motivate the base and represent the new face of the party. After his star power rubbed off on Dean, I know Kerry must have been green with envy that he didn't get Carter's support. Now he has it! Yay! They should also invite Al Gore to speak. 
Why not just go all out and invite Fidel Castro. he is a successful leader, right?
Or, we could invite Michael Dukakis (is he still alive?) and have him and Kerry ride round in a tank together.
