Here is the much tauted Newsweek article on the fact that Karl Rove talked with the Time reporter, Matt Cooper. Note that what Rove said is not what any lawyer would take to be illegal. Is this all there is? Powerline has more detail, and, since John is a lawyer, his views on all this are more to be trusted than mine. Also note this, kind-of-amusing thing from Craig Crawford:
If Karl Rove planned this -- which I doubt -- he really is a genius:
1.) He leaks to Time’s Matt Cooper in such a way that he avoids the law’s intent requirement for criminal liability (Newsweek notes that Cooper’s email shows nothing indicating Rove knew or revealed that Valerie Plame was an undercover agent, only that she worked at the CIA).
2.) The ensuing grand jury investigation dramatically weakens the news media and future leakers, as reporters must decide whether to testify or go to jail, and even turns Rove’s foes in the public against the reporters involved because they are seen as protecting him.
In other words, by making himself a protected source who loses that protection, Rove makes it easier for the government to use federal courts to target all leakers. This would give Machiavelli a migraine.