Anne Kornblut of the NY Times has this at the very end of her article about Karl Rove's grand jury appearance:
The identity of Mr. Novak's original source for the column that triggered the entire case is still unknown, at least to the public. Mr. Novak has testified to the grand jury since Mr. Rove's last appearance in October 2005.
He did? When has anyone reported anything about Novak, and why isn't this featured a bit more prominently? Novak has not exactly been Chatty Cathy on the subject of his involvement or cooperation in the investigation.
Of course, this might be wrong.