Obama is ahead. He isn't ahead by much, but he is ahead.
That means something needs to happen to shake up the race. I am doubtful McCain will go on the attack (although he desperately needs to). I am hopeful the GOP-leaning 527s will be able to get the job done for him.
Most Americans do not agree with Obama's policies, but they need to be informed on what those policies are. Time for our side to get to work.
After that, who else would even think about starting another 527?