CNN - busted!
The big deal is that if these people are claiming to be disgruntled republicans - if the idea is that people from the republican party are criticizing their own party - then it adds credibility. In addition it shows internal strife within the party. Either way, the idea is to make the party look worse than otherwise. At least when people like Dan Rather did it, we already knew he was a hard core democrat.
Check out the list of people on Michellemalkin.com.