Rove Reportedly Held Phone Talk on C.I.A. Officer Karl Rove spoke with the columnist Robert D. Novak as he was preparing an article that identified an undercover C.I.A. officer. 

This from the New York Times.  Here's the other thing, I think that I heard or read that Rove and the Wilsons went to the same church.  Don't quote me on this, I am not sure and I can't source it to anyone.