I don't think this story is going to be huge or serious.
It is quite conceivable that Amanpour and CNN actively cultivate "Al Quaeda" sources. Is the American public going to trust a reporter or news organization which colludes with the enemy??? I don't think so and I don't think CNN would be willing to divulge this info either.
CNN had no problem lying about their deal with Saddam and lying for Saddam to continue their access in Iraq.